Powerful Alnico 1 bar magnets, shipped in pairs, with separators and keepers. Width 1/2, Thickness 1/4.

A set of colorful ceramic disc magnets, in six primary colors. Magnets are 25mm in diameter.

Quick and easy tools for demonstrating thermal expansion. There are four bar combinations: Brass/Aluminum, Brass/Iron, Copper/Iron, and Brass/ Copper. Since each metal has a different coefficient of thermal expansion, they will create a unique curve when paired with a different metal. Metal bars…

Weights are made of brass, with nickel plated surfaces. All weights are carefully tested and calibrated. Analytical Weight Box contains a total of 9 weights from 1 to 100 grams, in polished wooden box, with fractional weights, rider and forceps.

Help students to investigate the force on an object in circular motion with this convenient kit. Through a series of simple demonstrations, students will better understand the relationship between the radius of the circular motion, the velocity of the moving object, and the external force required…

See-Through Sally™ provides a memorable visual aid for teaching human anatomy. This set consists of 12 spiral-bound anatomy charts, each representing a different area of the body, mounted on a rigid metal frame and floor stand. See-Through Sally is arranged according to both how the body…

A simple but effective device for demonstrating Lenz's Law using eddy currents induced in the wall of a copper tube by a falling magnet. The demonstrator consists of a 12"; long copper tube and two apparently identical metal slugs with rubber end caps. One slug is plain steel, and falls…

This simple but precise launcher projects 16 mm steel balls at ranges suitable for use on the bench top or from the bench to the floor. A protractor and plumb line make it easy to set any required launch angle from 45° downwards to straight up. Three different spring tensions give three…

Quality linear gratings protected by two glass plates, 60mm x 45mm. Viewing area measures approximately 37mm x 20mm. The DFG525-pk/5 Diffraction Gratings in Slide Viewers has a viewing area of 35mm x 25mm.

Inspired by naval periscopes used on submarines, our handheld periscope is designed to show students the reflective qualities of light. Our version consists of an outer case with mirrors at each end set parallel to each other at a 45 degree angle.

Equilateral prisms, made from high quality clear acrylic sheet with highly polished surfaces.

This inexpensive 3x magnifier is great for general purpose use.

This Collection contains 20 Types of Specimens, (10 Rocks Specimens of Igneous, Sedimentary& Metamorphic Rocks Types & 10 Minerals Specimens). The Rock Specimens include Some of the following Basalt, Granite, Pumic, Gniess, Marble, Quartizite, Serpentine, Bituminous Coal, Lime Stone, Sand…

Our meters are mounted in black plastic cases. Meters have a scale length of 75mm, offer +/- 2.5% accuracy and come with 5-way binding post and external calibrating screw. Meters are not protected against prolonged or significant overload. Stackable for storage.

Polished Flint Glass or Acyrlic Right Angle Refraction Prism.

This excellent quality electrostatic generator consists of a charge generation system, an aluminum collector sphere and an electric motor drive on a sturdy base. The charge generation system is based on a moving neoprene belt mounted on insulating rollers with metal charge transfer combs. The…

Equilateral prisms, made from high quality clear glass sheet with highly polished surfaces.

Folding Magnifiers in plastic cases. 25mm lens, 5x magnification. Double magnifier has two lenses for 10x magnification and triple magnifier has three lenses for 15x magnification.

This magnetic compass is extra large (90mm diameter), comes in a bright color plastic case, with a clear plastic top. Shipping weight: 2.0 oz. Dimensions: 4"; x 4"; x 1".

A basic inexpensive Fan Cart powered by two AA size batteries (not included) demonstrates Newton’s principle of action and reaction. Batteries are contained in the removable power unit and the fan is con-trolled by a switch. The propeller delivers a thrust of about 88 mN, accelerating the…

Individually calibrated weights made of high quality stainless steel. Both sets come with a sturdy plastic storage block. Set of 9 includes 1 each of 5g, 10g, 50g, 100g, and 500g, plus 2 each of 20g and 200g weights. Set of 10 includes all of the previously mentions, plus 1 each 1000g weight.

This unique kit allows students to make a wide range of investigations with only a small number of items. The kit contains two sets of three metal cylinders - aluminum, copper, and steel. In one set the cylinders all have equal masses, and in the other they have equal volumes. The measuring…

Folding Magnifiers in plastic cases. 38mm lens, 5x magnification. Double magnifier has two lenses for 10x magnification and triple magnifier has three lenses for 15x magnification.

This device can be used as a classic standard calorimeter or as an electric calorimeter. Made of aluminum and plastic, the calorimeter has a diameter of 10cm, height of 11cm, liquid capacity of 175ml, and a heat capacity of 25J/°C. Electrical requirements are 6V DC, up to 2A.

Set includes two helical springs. The long, narrow spring measures 3/4" x 72", and can be extended to 5 meters. The larger spring measures 3" x 4", and can be extended many times its length without distortion. The long, narrow spring measures 3/4" x 72", and can…

The United Hartl Optical Disk is a compact apparatus that demonstrates the behavior of optical elements by means of ray paths through clear acrylic models. It consists of a circular 9” diameter graduated disk mounted on a stand and fitted with a ray box on an adjustable arm. Narrow, parallel…

Includes two acrylic lenses, one each of double convex, and double concave, and three mirrors, one each of convex, concave and plane. Packed in a cushioned wood storage box.

Magnifying Glass with Glass lenses molded into high quality unibody plastic frames.

This excellent instrument is easy to set up and easy to use and is designed for students to make precise measurements. This unit features high quality 22MM optics, a built-in illuminated auto-collimator for fast set up, a 17.8 cm diameter divided circle with clear gradations, a double-ended vernier…

An exceptional value! This kit includes a variety of Magnets, and accessories for teaching basics of magnetism. Comes in a reusable storage box. Shipping weight 1.5 lb, dimensions: 9.25"; x 9"; x 1.5";. KIT INCLUDES THE FOLLOWING: 1 Steel horseshoe magnet, 3 Ceramic donut magnets, 1…

Introductory level metric micrometer graduated to read up to 25mm in 0.01mm division. Comes in a plastic storage case.

This sturdy pulley is excellent for use with an inclined plane or any other similar apparatus. Ite features a 4-cm plastic pulley mounted on a chrome plated steel rod. The overall length is 15cm and the shaft diameter is 8mm.