... , sound insulation and efficiency, it can put out of the firing of type A,B,C and D, it especially appropriated ... has difficult in cleaning leftover, such as in the sites of nonrenewable resources, like electrical ,communication,metallurgy, electric power, ... :926L,1000LTechnical specifications:Description Unit First Grade Regular QualityMass fraction of HFC-236fa % ≥99.8 ≥99.5Moisture % ≤0.001 ...