Open polymer plain linear bearing Mounted Inside Dia 12 mm Material Anodized Aluminum Accelerated Speed 8 Meters/Second Bearing Type Ball Bushing Body Width (In.) 43 mm Dimension a 1.693 in Dimension A1 0.846 in Dimension A1 (In.) 0.846 in Dimension A (In.) 1.693 in Dimension B 1.535 in Dimension B (In.) 1.535 in Dimension d 0.472 in Dimension E 0.906 in Dimension E1 1.26 in Dimension E1 (In.) 1.26 in Dimension E (In.) 0.906 in