5 mm, Dimension S3 M5, For Use With Linear Guide, Mounting Hole Center to Center 40 mm, Mounting Hole from Shaft End 15 mm, Mounting Hole Size 8 mm, Series SEBS-B, System of Measurement Metric.5 mm, Rail Material Stainless Steel, Dimension B1 23 mm, Dimension F1 4.Guide Rail, Overall Length 550 mm, Overall Width 42 mm, Overall Height 9.