Vapor Containment/Pollution Control Balls Specifications Back to Vapor Containment/Pollution Control Balls SURFACE COVERAGE NOMINAL PACKING NOMINAL SIZE BALLS/FT WEIGHT *BALLS/PACKAGE SG 20 mm (.787") 280 1.4 grams 9,000 0.30 25 mm (1") 180 2.3 grams 4,000 0.25 38 mm (1.5") 80 7 grams 1,200 0.20 50 ...