for 3/8in 1/2in 5/8in 3/4in DIAMETER DRAINS - This Drain Boat Plug is designed to fit for 3/8in 1/2in 5/8in 3/4indiameter drain openings EASY TO USE - Insert the Drain Plug into the drain opening and turn the handle clockwise to tighten it in place, lever down to lock. Turn counterclockwise to release CONSTRUCTION - Made of non- Brass for long-lasting durability and features a rubber gasket to create a tight seal HOW IT WORKS - This plug consists of a rubber plug and Brass lever which when in the depressed position expands the rubber to hold the plug securely in the hole APPLICATIONS - Commonly used to plug the drain hole in many production boats, other uses include livewells, baitwells and coolers. Material: Rubber + Brass Color: As shown Package Contents: 4X Compression Drain Plug Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.