Description: Plastic Paddle Board Surfboard Auto Air Vent Screw-In Exhaust Valve Plug Gear. High quality plastic material with waterproof and dust-proof function. UV resistant, sturdy, lightweight and durable. Easy to install, remove and use. Great for stand up paddle board, surfboard, watercraft and etc Specification: Material: Plastic Bottom Outer Diameter: 27mm/1.06inch Top Outer Diameter: 32mm/1.26inch Color: Black,White Note: Color might be slightly different due to the color calibration of each individual monitor. Package Includes for 1 Piece Air Vent: 1 Piece Air vent Package Includes for 6 Pcs Air Vents: 6 Pcs Air Vents Please allow slightly measuring deviation due to manual measurement.