Need a spare over pressure valve (OPV) for your lift bag or BCD? XS Scuba's OPV comes in both 1" and 2" (2.5 and 5.1 cm) diameters. OPV is made from durable noncorrosive plastic with a durable corrosion resistant spring. Valve has a pull cord with plastic knob for easy use. If your lift bag or BCD is over-inflating the valve will automatically compress the valve spring and relive pressure to avoid rupture of the bag or BCD. OPV makes a great save-a-dive-kit item.

Great addition to your save-a-dive kit. Made from durable non-corrosive plastic. Comes in both 2" Diameters.

Exterior Finish: Plastic. Item Dimensions LxWxH: 3.9 x 2.6 x 0.4 inches. Brand: XS Scuba. Material: Plastic. Date First Available: February 14, 2013. Best Sellers Rank: #415,599 in Sports & Outdoors. Customer Reviews: 3.9 out of 5 stars 13 ratings 3.9 out of 5 stars. : B00BFM8KZ4. Size: ?2" Diameter. Part Number: ?BP52. Manufacturer: ?XsScuba. Material: ?Plastic. Brand Name: ?XS Scuba. Item Weight: ?0.05 Pounds. Item Dimensions LxWxH: ?3.9 x 2.6 x 0.4 inches. Package Weight: ?0.03 Kilograms. Item Package Dimensions L x W x H: ?6.34 x 5 x 1.22 inches.