Product Features: Features an o-ring for positive sealing Fine threads maintain sealing under high vibration conditions Retention system keeps plug from getting lost when removed Ideal for boat transoms, fish wells, ice chests and more Product Specifications: Material: PP Color: Black Press board size: Approx 5.6*3.1*1.4cm / 2.2*1.2*0.6 inch Outside diameter of scupper plug: Approx 2.6cm / 1 inch Length of scupper plug: Approx 5.7 cm / 2.2 inch Function: Stops water infiltration and is used to drain the water out of the inner hull of your boat Package Including: 2 x Drain plug 4 x Screws