PBC Linear MR20R 0340 Linear Guide Rail, Size 20, 340 mm Length, 20 mm Width, Aluminum 35432 55 Manufacturers Suggested Sole Slip 55 Manufacturers Suggested Sole Slip Rating Better Shank Material Fiberglass Completely Non Metallic No Puncture Resistant Insole No Oil Resisting Sole Yes Waterproof Type Gore Tex CSA Footwear Standard Not Specified Mark II Slip Test Results Dairy Tile Oily Not Tested Conductive No Insulation Type None Ninety Degree Heel Yes Footwear Style 8 in Work Boot Metatarsal System No ASTM Footwear Class F2413 18 I C EH Chain Saw Cut Resistant No Insole System Ortho Lite PU Footbed Mark II Slip Test Results Dairy Tile Dry 0 HID525 For Use With Mfr Number of Mounting Holes 6 Range (F) 0 248 Channel Material Steel Screw Type Low Profile Socket Head Cap Number of Rail Holes 6 Mounting Hole from Shaft End 20 mm Mounting Hole Center to Center 60 mm Mounting Hole Center to Shaft End 30 mm Mounting Hole Size 6 mm Overall Length 340 mm Overall Width 20 mm Overall Height 13