3M PT4TMB ~ Fire Barrier Pass Through Triple Mounting Brackets Pair 4 in Square 7000059408 Color_Green 3M Hard Hat Suspension Material_Goat Skin Leather 3M Hard Hat Suspension One kilogram will neutralize approximately: 500 ml of sulphuric acid 96 % 550 ml of phosphoric acid 85 % 660 ml of nitric acid 70 % 250 ml of hydrochloric acid 32 % 310 ml of chlorosulphonic acid Part #: AN4KG dry Used in conjunction with three 4 inch square 3M Fire Barrier Pass Through Devices the 4 inch x 12 inch 3M Fire Barrier Pass Through Triple Mounting Brackets PT4TMB provide additional support to the device when installing three devices stacked (vertically or horizontally) together in a 1 x 3 array