Strong Metal Material: Stainless steel locking hexagon, stainless steel gasket, brass thimble, high pressure resistant and stable,reliable, allows the chemical slurry to completely enter the concrete structure deep inside the tiny cracks, good water stopping effect. Convenient To Use: Non- rubber pier designed for ease of use. Compact Size: and convinient to take iteverywhere with you. Easy To Use: Simple construction process, easy to use.Fast and efficient construction. Always Available: The construction is not limited by season or weather and can be used for all kinds of works, including overhaul and repair works and drinking water works. Reusable Water Stopper: Water stop pins are durable, rustproof, robust and reusable. Widely Applicable: Widely used for indoor and outdoorconcrete slab cracks, through-wall pipes, wall corners, tunnels and other water leakage, with water plugging. Weight: 220g Model Number: Hot-melt Water Stop Pin for Tunnels Type: Bath Hardware Sets color:Photo color Material:metal Package Contents: 3 x Water stop needle(1/2,3/4,1inch) 1 x wrench 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.