Tube Stopper:Three sizes of 1/4inch 1/6inch, and 1inch, and easy to carry, and can be used for overhaul and repair works and drinking water work. Easy to Use:Install Stopper on the matching wrench, insert it into the PPR pipe obliquely, rotate and tighten until the water stop, welding the pipe with a hot melt machine, and take out the Stopper after the welding is completed. Material:reusable, rust resistance, not easy to damage. Available:Put into the water pipe, which is used to twist the pin, so that the rubber loop expands to achieve the of water stop. Application:Widely used for indoor and outdoor concrete slab cracks, through wall pipes, wall corners, tunnels, and other water leaks, with a water stop function. Colour:As Shown Material:plastic+metal Package Contents: 1 Set * Hot Melt Stopper with Rubber Cover(1 * extractor, 1 * wrench, 3 * PC heads, 6 * rubber sleeves) 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.