ITEM NAME:2" Replacement Scuba Diving Dive Over Pressure Valve for Lift Bags New Hot Descriptio n 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 Specifications: Material: Environmental-friendly ABS Diameter: Approx. 5.1 cm/2 inch Height: Approx. 3.1 cm/1.2 inch Color: Black Package Included: 1 *Â Scuba Diving Over Pressure Valve Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. Whatever the ending's perfect or not, you can't disappear from my world 2" Replacement Scuba Diving Dive Over Pressure Valve for Lift Bags New Hot.Attached with pull string lanyard, easy to assemble and convenient to use. We'd like to settle any problem in a friendly manner. It can rapidly remove air when needed and eliminate accidental over-inflation during ascent from expansion.