Dimensions: 8mm inner diameter, approximately 10.5mm outer diameter Total length: 3.1 meters, including a 1-meter inlet and 2-meter outlet pipe. pipe connector: Only compatible with 8mm inner diameter pipes. tank usage instructions: 1. When pouring gasoline, do not remove the built-in filter; it effectively filters impurities from the . 2. If using a mixed , shake well before use. 3. When connecting the line, be careful not to bend the ejector pin on the nipple. 4. Before starting the outboard motor, loosen the copper vent screw on the tank cap; otherwise, gasoline not enter the engine. Precautions: 1. This tank is intended for fueling the outboard motor only and is not intended for long-term gasoline storage. If not in use for an extended period, pour the gasoline into a metal drum. 2. When storing gasoline in an external tank for a short period of time, tighten the vent screw on the tank cap to prevent dangerous evaporation. Keep the tank in a cool, dark place, out of direct sunlight. Color:black Material:RUBBER Package Contents: 1PCS Line Assembly 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.