Material: Made of high quality 304 stainless steel and rubber material, strong and durable Adjustable: Installed from inside the backplate, rotatable, fully adjustable and won't leak or wobble under vibration Scope: suitable for 1 inch holes, typically used for bottom tanks and stern plates of boom hulls Package includes: 1 x drain plug 304 stainless steel handle fixed rubber drain plug hull and stern style folding hull marine accessories for seagoing vessels silver functionality: Material: Made of high quality 304 stainless steel and rubber material, strong and durable Easy to use cam style for an airtight and durable seal Adjustable: Installed from inside the backplate, rotatable, fully adjustable and won't leak or wobble under vibration Suitable for 1 inch holes, typically used for bottom tanks, stern plates and barrage hulls description: Product material: 304 stainless steel Color: silver Weight: 40 grams Range: 23MM-26MM Volume: 100 40 30 mm Packing: OPP bag The package includes: 1 drain plug