Clear Color Hides Shim Simplifies All Leveling Requirements CRL Clear Plastic Horseshoe Shims are made to simplify leveling problems wherever they occur and have been approved by architects for use in the installation of windows, doors, curtain-walls, storefronts and insulating glass units. They are adaptable for use in the appliance, automotive, aviation and mobile home industries as well. They help cut labor and material costs wherever used. Color: Clear Thickness: 1/16 in (1.6 mm) Length: 3-1/2 in (88.9 mm) Width: 1-1/2 in (38.1 mm) Additional Product Information: CRL Horseshoe Shims are made of a clear high impact styrene plastic, properly designed and balanced for vertical or horizontal use. Available in three thicknesses 1/16, 1/8 and 1/4 inch (1.6, 3.2 and 6.4 millimeter). All sizes have 9/16 inch (14.3 millimeter) space between the legs. The 3-1/2 inch (88.9 millimeter) length is extremely popular to install storefront aluminum, as most major storefront fabricators use 4 inch (101.6 millimeter) tubing. You will find these valuable aids in your building requirements.