Standard Linear Bearing Inside Dia 1 in Outside Dia 1 9/16 in Material Anodized Aluminum Accelerated Speed 14 Feet/Second Color Red Dimension B 1.563 in Dimension C 2.25 in Dimension C1 - Dimension C2 - Dimension d - Dimension D1 - Dimension E 60 in Dimension F 0.136 in Dimension G 1/8 Dimension L - For Use With Support and Feather Rails Inside Dia Tolerance +/-0.001 Length 2 1/4 in