... -quality polystyrene.2. Packing:10pcs/polybag,500pcs/carton90*15mm,1 room ,3vents,500pcs,carton,carton size:48*48*34cm,G.W ... /N.W:9/8KGS90*15mm,2 room,3vents,500pcs,carton,carton size:48*48*34cm,G.W ... /N.W:10/9KGS90*15mm,3 room ,3vents,500pcs,carton,carton size:48*48*34cm,G.W ... /N.W:11/10KGS 3. Petri dish rack can be carried out by high-temperature sterilization disinfection.4 ...