Handler 81C 81C Plaster BinHandler 81C A three compartment plaster bin which may be hung on the wall or placed on a benchtop. The 81C is manufactured of heavy gauge sheet steel and finished in a durable, baked warm gray finish. Each compartment of this plaster bin is built to hold 25 lbs [11. 3 Kg] of stone or plaster. Special design prevents gypsums from pushing out from lower access door when plaster bin is being filled.