The Vitrex Tile Levelling Clips & Wedges. Two-part system of clip (Part A) and wedge (Part B) automatically aligns the tiles, ensuring the tile surface is level. The extra large wedge design allows for easy handling with thumb push. Evenly spaces tiles to prevent joint variation and wedges hold tiles at even height until the adhesive sets. Can be used with all types of wall and floor tiles including porcelain, ceramic and natural stone. Suitable for tiles 3-12mm thick.