Meets UN 1H2/Y1.5/30 for 5 gal and 1H2/Y43/S for 6 gal pail when combined with UN rated pails. Rigid skirt and SBR rubber gasket ensures tight seal. Fits 3.5-6 gal. pails Meets UN 1H2/Y1.5/30 for 5 gal and 1H2/Y43/S for 6 gal pail when combined with UN rated pails. Rigid skirt and SBR rubber gasket ensures tight seal. Fits 3.5-6 gal. pails (25.2 lbs total weight)