ITEM NAME:2 inch Durable ABS Plastic Scuba Diving Dive Dump Valve/Over Pressure Relief Description: Scuba diving standard over pressure valve / dump valve for lift bags and BCD's to prevent rupture, lightweight, strong, durable and portable It can rapidly remove air when needed and eliminate accidental over-inflation during ascent from expansion Constructed from ABS plastic body, rubber gasket and corrosion resistant steel spring Attached with pull string lanyard, easy to assemble and convenient to use Great spare replacement accessories for scuba diving Specification: Material: Environmental-friendly ABS Diameter: Approx. 5.1 cm/2 inch Height: Approx. 3.1 cm/1.2 inch Color: Black Package Includes: 1 Piece Scuba Diving Over Pressure Valve Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks! SKU: DMO0001309954027978.Scuba diving standard over pressure valve / dump valve for lift bags and BCD's to prevent rupture, lightweight, strong, durable and portable. 1 Piece Scuba Diving Over Pressure Valve. Attached with pull string lanyard, easy to assemble and convenient to use.