The U-shaped plastic shims are made of quality PP material, sturdy and secure with stable structure. They come in four different thicknesses to suit various spacing requirements. Easy to use, convenient for construction industry workers. Suitable for spacing tiles, windows, installation, curtain walls and more. Features: 1. Quality Material: These U shape plastic shims mainly adopt quality PP material, reliable and stable, sturdy and secure, not easy to break, fade or wear, serving you for a long time. 2. Ample to Use and Share: Multi color for choose and abundant in quantity, convenient for you to use, replace or share, sufficient to meet your daily needs. 3. Measurement: Thickness: Blue: 1.6mm, Red: 3mm, Yellow: 4.7mm, Black: 6.2mm, for you to choose. 4. U Shaped Design: The tile spacers are designed with horseshoe and U shaped, with stable structure, suitable for spacing tiles, windows, installation, curtain walls and other spacing requirements. 5. Easy to Operate: You just need to place the prongs of the horseshoe shims in grout joint, very suitable for people engaged in the construction industry, easy and convenient. Specification: Material: PP Product Color: Blue, Red, Yellow, Black Product Size: Thickness: Blue: 1.6mm, Red: 3mm, Yellow: 4.7mm, Black: 6.2mm Product Weight: 535g, 370 g, 245 g, 130 g Package Included: 100 x U Shaped Tile Leveling Shims