LB Agar: is for solid phase bacterial growth and is supplied as a premade format or as convenient size dry powder packs.
LB Agar (Premade): Available in a premade format, simply heat in a boiling waterbath or microwave to melt and pour into Petri dishes. Each 100ml bottle makes up to 7 Petri dishes.
LB Agar: A dry powder format that requires addition of water and subsequent autoclaving to sterilize before use. Supplied as a set of 10 convenient individual use packs. Each pack sufficient to make 150ml LB agar or up to 10 Petri dishes. Larger 50gm size packs are also available.