Description: Screw type drain plug bung, durable, lightweight and easy to use 1" hole required for mounting Used to stop water infiltration and to drain the water out of the inner hull of your boat The retention system keeps plug from getting lost when removed Great accessories for boat transoms, fish wells, ice chests, yacht and more Specification: Material: ABS Color: White Size (L x W): Approx. 2.59 x 1.42 inch/6.6 x 3.6 cm Screw Hole Diameter: Approx. 0.2 inch/0.5 cm Screw Thread Outer Diameter: Approx. 1.02 inch/2.6 cm Package Includes: 1 Piece Boat Drain Plug Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!