PBC Linear SRAM20 0900 SL Linear Metric Shaft Assembly, 20 mm Shaft Dia, 900 mm Lg, Steel 2HCE2 while a contoured while a contoured Bore Style Smooth Clamp Material 316 Stainless Steel Clamp Material Finish Elastomer Clamp Type Rail Mount Assembly Cushion Material Polypropylene For Maximum Outside Diameter 42 mm For Number of Lines 1 Hardware Material 316 Stainless Steel Includes (1) Rail Nut Shaft Hole Thread Size M6 For Use With FrelonGOLD(R) Linear Plane Bearings and Pillow Blocks Shaft Material Grade 1060 Shaft Material Steel Rail End to Hole 75 mm System of Measurement Metric Product Type Linear Shaft Support Rail Assembly Support Rail Material Aluminum Shaft Drilling Pre Drilled Shaft Hole Spacing 150 mm Standards ISO Support Rail Drilling Pre Drilled Shaft Hardness RC 60 Compatible Series FrelonGOLD(R) Linear Plane Bearings and Pillow Blocks Shaft End to Hole 75 mm Country of Origin United States