Polymer plain linear bearing Mounted Inside Dia 30 mm Material Anodized Aluminum Accelerated Speed 8 Meters/Second Bearing Type Ball Bushing Body Width (In.) 87 mm Dimension a 3.425 in Dimension A1 1.713 in Dimension A1 (In.) 1.713 in Dimension A (In.) 3.425 in Dimension B 3.11 in Dimension B (In.) 3.11 in Dimension d 1.181 in Dimension E 1.772 in Dimension E1 2.677 in Dimension E1 (In.) 2.677 in Dimension E (In.) 1.772 in