Open polymer plain linear bearing Mounted Inside Dia 40 mm Material Anodized Aluminum Accelerated Speed 8 Meters/Second Bearing Type Ball Bushing Body Width (In.) 108 mm Dimension a 4.252 in Dimension A1 2.126 in Dimension A1 (In.) 2.126 in Dimension A (In.) 4.252 in Dimension B 3.583 in Dimension B (In.) 3.583 in Dimension d 1.575 in Dimension E 2.283 in Dimension E1 3.386 in Dimension E1 (In.) 3.386 in Dimension E (In.) 2.283 in