NEW WITH DOUBLE-SHIELDED ABEC 3 BEARING URETHANE SURFACE Idler Rollers D₁ D ROLLER NO CHAMFER BEARING d SECTION  A-A A A S 3 S Face Width ± 0.25 5 8 7 Catalog Number A  7Z  8MURBB1205 A  7Z  8MURBB1905 A  7Z  8MURBB1606 A  7Z  8MURBB1906 A  7Z  8MURBB2810 A  7Z  8MURBB3810 A  7Z  8MURBB3812 A  7Z  8MURBB4412 MATERIAL:   Roller - Urethane 60 Durometer Ground Outside Diameter Bearing, Double-Shielded  - Stainless Steel 12   6   5 D ± 0.075 d Bore - 0.005 12 19 16 19 28 38 38 44 10 D1   9 28 13 19 6  REV:  4-12-07  JC