This drain plug kit stops water infiltration and is used to drain the water out of the inner hull of your boat. Its fine threads maintain sealing under high vibration conditions and retention system stops plug from getting lost when removed. Features: Universal drain plug kit to add or replace old drain plugs. Made of high quality material, durable for long time use. Easy to install on or remove from the kayak. Fine threads maintain sealing under high vibration conditions. Retention system stops plug from getting lost when removed. It stops water infiltration and is used to drain the water out of the inner hull of your boat. Specifications: Material: Polypropylene Outside Diameter of Scupper Plug: Approx 2.6cm / 1.02inch Inner Diameter of Scupper Plug: Approx. 1.8cm/ 0.71inch Length of Scupper Plug: Approx. 5.4cm / 2.13inch Width of Scupper Plug: Approx. 3.1cm / 1.22inch Item Weight: 20g / 0.71oz Package Size: 12 * 9.8 * 3.1cm / 4.72 * 3.86 * 1.22in Package Weight: 42g / 1.48oz Package List: 2 * Drain Plug Kit 4 * Screw Note: 1, Please allow 1 - 2cm (0.4 - 0.8") differences due to manual measurement, thanks. 2, The listing just includes 2 drain plug kits only, other accessories are Not included in it.