WebLearn More. Tandem Vibratory Rollers CB2. Chemical Resistant Specific gravity up to 1.7, excludes flammable carbon, Tank Material Polyethylene, Application Storage tank, Dimensions L x W x H in. 38 x 30 x 29.25, FDA Approved Drinit Water Yes, Tank Description Square, Drain Size in. 3/4, Fill Opening in. 5, Tank Size gal. 100, UV