Standard Linear Bearing Inside Dia 25 mm Outside Dia 40 mm Material Anodized Aluminum Accelerated Speed 14 Feet/Second Between Grooves (mm) 40 Color Blue Dimension B 40 mm Dimension C 58 mm Dimension C1 - Dimension C2 - Dimension d - Dimension D1 - Dimension E - Dimension F - Dimension G - Dimension L - For Use With Linear Motion Shafts Inside Dia Tolerance +/-0.001 Length 58 mm