Hardy Diagnostics contact plates are recommended for use in the cultivation of microorganisms from environmental surfaces. Sabouraud Dextrose Agar is recommended for the selective isolation of fungi and yeasts from environmental, clinical, and nonclinical specimens. P36 is standard contact plate, also commonly referred to as Rodac ™, for surface monitoring featuring the Lok-Tight lid that securely fastens to the base. 3 Easy Steps: 1. Remove lid. 2. Gently press plate to surface without twisting or sliding. 3. Twist clockwise until frosted bands line up to lock lid into place. Our Contact Plate features: Friction lid The friction lid design keeps lids in place before sampling. Lok-Tight™ Locking Lid An optional locking feature means lids stay secured post sampling and during transport to your lab. Molded Grid Each plate has a grid molded into the bottom of the plate to aid in the counting of microorganisms. Certificate of Analysis Available online for each lot.