characteristic: locking hexagon nut and washer are rustproof. Spontaneous rubber can resist aging. Insert the needle into the water pipe and twist the rubber ring to effectively realize the water stop function. First, connect the water stop pin to the corresponding wrench. Then, insert it into the water pipe and rotate it tightly to stop the water flow. Weld pipes with a hot-melt machine. Finally, after the welding process is completed, remove the water stop needle. The water stop plug of hot melt water pipe is made of High-quality materials to high pressure and stability. Suitable for various tasks, such as overhaul, maintenance and drinking water engineering. describe Name: hot melt water stop needle set Material: Metal colour: balck+silver Package Contents: 1 x Hot melt water stop needle set 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.