SKF TMAS 380 Machinery Shim Kit (50x50mm, 75x75mm)Made of high quality stainless steel (grade 304S31), allowing re-use.Easy to fit and to remove.Close tolerances for accurate alignment.Thickness clearly marked on each shim. Machinery Shim Kit (Shim size 50x50 mm, Quantity Per Thickness: 20) Accurate machine adjustment is an essential element of any alignment process. SKF single slot pre-cut shims are available in five different dimensions and in ten different thicknesses.Note: Each kit of SKF single slot pre–cut shims offers a combination of popular shim dimensions and/or thicknesses.