$6.35 Puritan Bennett 21A / 31A / 41A Vent Valve Silencer quantity Add to cart SKU: CS330-1 Category: PB 21A 31A & 41A Tags: 21A, 31A, 41A, 776827, bennett, puritan, silencer, valve, vent Description Description Please Call 866-446-8765 to order. Online ordering currently unavailable. MFG # 776827 Item# CS330 Call 866-446-8765 for pricing and availability. Related products HomeFill M9 Cylinder w/ Post Valve Read more UltraFill ME Cylinder w/ Post Valve 2000 PSI Read more UltraFill M6 Cylinder w/ Post Valve 2000 PSI Read more UltraFill ME Cylinder w/ Post Valve 3000 PSI Read more