"17 GAL. TANK OF POLYOL COMPOUNDS CALLED CHEMICAL""B"";CFC FREE;TANK IS RETURNABLE.REFILLABLE,REUSABLE W/EST.WT. OF 150 LBS;THE CHEMICALS ARE MIXED AS THEY ARE RELEASED THROUGH A""FOAM DISPENSER""AS LIQUID FOAM WHICH CUSHIONS AS IT RISES AND CONFORMS TO THE SHAPE OF THE ITEM IN THE CONTAINER"