Suitable for tiles with a tile spacing of 2 to 6 mm and a thickness of 5 to 17 mm to hold tiles in the same horizontal position.materials: the tile levelling system kits are made of PP and stainless steel. It is durable and does not rust and can be reused. Efficient: The levelling system can increase the installation speed of the tiles and save a lot of time. Suitable for DIY enthusiasts and professional tilers. Easy to use: the tile leveller for tile alignment are easy to use, with the included special key, you can easily secure and remove the leveler.Package: 50 levelers and a professional key. Dimensions: the level is 3.7 cm wide and 7.3 cm high, the key length is 15 cm and the height is 1.5 cm. This is a great collage tool for floor and wall installations. Producthe levelling system is made of PP material. The T-shaped pin is made of stainless steel. It is durable and will not rust. It can be reused. Exquisite workmanship. Tile levelling system helps DIY and professional tile layers, improve efficiency when laying tiles and achieve perfect, non-smooth surfaces. Areas of use: The tile straightener is suitable for tile spacing between 2 and 6 mm and for tile thicknesses from 5 mm to 17 mm. Easy to use. Tile levelling discs are easy to use and install, and the included special key makes it easier to secure and remove the levelling disc.Specifications: Product name: tile straighteners. .Material: PP + stainless steel. Size: the levelling system is 3.7 x 7.3 cm, the spanner is 15 x 3 cm.Weight: 585 g. Quantity: 50 pieces. Package Included: 50 pieces tile straighteners, 1 piece wrench.