Asst contains 10 each of the following thicknesses: 0.025mm, 0.05mm, 0.1mm, 0.2mm, 0.25mm, 0.4mm, 0.5mm, 0.7mm, 1mm, and 2mm. Made from a 300 series stainless steel that resists rust and corrosion. 50mm x 50mm. Slot Size – 16mm. Packaged in a sturdy chipboard box. Precision Brand® Slotted Shim is the best way to solve alignment and leveling problems on motors, pumps, generators, and other plant machinery. Slotted shims are economical, safe, and accurate. Reduce labor costs by eliminating hand cutting and reduce downtime by eliminating shim preparation.