VF3502 dust collection bags compatible with RIDGID 12 - 16 gallon shop vacuums. Bag dimensions when spread out: 36-3/5" x 15-3/5", 3" fitting diameter. Fit 12 Gallon models: HD1200, HD1280, MOB1200, WD12701, 50323(1200RV), 50333(1250RV). Fits 14 Gallon models: HD1400, HD1402C, WD1450, 50348(1400RV), 50368(RV2400HF), 50358(RV2400A). Fits 16 Gallon models: HD1600, HD1640, HD1800, MOB1600, WD1640, WD1680, WD1851, WD1850, WD1950, WD1956, RT16000, 50353(1610RV), 50343(1620RV), 50338(RV1650), 50363(RV2600B). They do not fit 12 gallon vacs WD12000, WD12450, WD12460, WD1250, WD12780, WD1280, or 16 gallon vacs WD1625, WD16350, WD16360, WD1637, WD16650, or WD17351. These bags only fit vacuums with a nozzle, not hose connection in the top. Made with double-layers of polypropylene for fine dust filtration. Features a rubber sealing collar design to prevent air or dust leaks during use.