SUPCO BPV-31 Bullet 3-in-1 Line Tap Piercing Valve, 500 psi Pressure, 1/4", 5/16", and 3/8" OD Size (Pack of 12) Ryobi it fits snugly into standard

it fits snugly into standard duct openings

Made from high-quality materials for long-lasting performance

Warranty: 1 Year

These 24" x 30'' x 1" filters are constructed with a spun glass media with resin bonding and a heavy chipboard box frame

SUPCO BPV-31 Bullet 3-in-1 Line Tap Piercing Valve, 500 psi Pressure, 1/4", 5/16", and 3/8" OD Size (Pack of 12) Ryobi it fits snugly into standardSUPCO BPV 31 Bullet 3 in 1 Line Tap Piercing Valve, 500 psi Pressure, 1 4", 5 16", and 3 8" OD Size (Pack of 12)Non positional mounting, not adapter valve requiredA Sealing Force Of Over 180 Inch Lbs., Torque Tested With 450 Lbs. Pressure Tested At 250FPatented valve gasket provides 50 times more sealing area than competitive 'o' ring typesCorrosion resistant500 psi maximum pressure