ITEM NAME:Brass Rubber 1inch Twist Turn Boat Drain Plug Heavy Duty Boat Hardware Description: 100% brand new and high quality. Mount from inside transom. Made of rubber & brass, rugged corrosion resistant construction, durable. Twist-Turn Plug: fully adjustable design will not leak or jar loose under vibration. Suitable for 1" hole. Package Includes: 1 Piece Twist Turn Boat Drain Plug Note: Please allow 1-2mm difference due to manual measurement. Thank you..1 Piece Twist Turn Boat Drain Plug. Twist-Turn Plug: fully adjustable design will not leak or jar loose under vibration. Made of rubber & brass, rugged corrosion resistant construction, durable. Mount from inside transom.