ITEM NAME:Nylon Marine Boat Drain Plug Kayak Yacht Anti Loose Self Retaining Sealing Raft Description: Material: Made of nylon material, practical and durable. Feature: Screw type drain plug with a red o-ring washer for positive sealing. Function: Retention system prevents plug from getting lost when removed. Applies To: Mounts in a 1"/25mm diameter hole in hull. Replacement Accessories: For marine boat, yacht, raft, kayak, canoe, dinghy and so on. Specifications: Product name: Boat drain plug Color: Black Material: Nylon Bung outer diameter: Approx. 2.5 cm Flange size (L x W): Approx. 5.3 x 3.6 cm Screw hole diameter: Approx. 0.4 cm Height: Approx. 5.45 cm/2.15 inch Package Included: 1pc* Boat drain plug Note: Transition: 1cm=10mm=0.39inch. 1.Due to the light and screen difference, the item's color may be slightly different from the pictures. 2.Please allow 0.5-2 cm differences due to manual measurement..Feature: Screw type drain plug with a red o-ring washer for positive sealing. 1pc Boat drain plug. Material: Made of nylon material, practical and durable. Function: Retention system prevents plug from getting lost when removed.