Wire Bundle Retainer. 0.75 Inch (19.1 mm) Bundle Diameter. No. 6 (M3) Screw. Harness board accessory configures wiring into a pre-formed bundle during harness assembly. Spring fingers with large lead-in facilitates insertion of cable bundles. The BR.5 and BR.75 can be joined together to allow for wire breakouts. Material is Impact Resistant Nylon 6.6. Color is Black.