Assortment contains 10 each of the following thicknesses: 0.0005″, 0.001″, 0.0015″, 0.002″, 0.003″ ,0.004″, 0.005″, 0.0075″, 0.010″, 0.0125″, 0.015″, 0.020″, 0.025″, 0.030″, 0.040″, 0.050″, and 0.060″. Made from a high quality, color coded, plastic material, that has minimal compression during use. Size aa – 1″ x 1″. Slot size – 5/16″. Packaged in a sturdy chipboard box. Precision brand plastic slotted shim is used for mounting and leveling smaller, fractional horsepower motors, various gages and instruments, and light-duty plant machinery. A more economical option when stainless steel slotted shim properties are not needed. Plastic slotted shim is not recommended and should not be used for larger, heavier motors.