Open barrel non-insulated german connectors are correct for German car restorations. This female connector has a locking tab making it great for use in relay housings or anywhere a locking tab is required. This standard width 6.3mm (0.250 in.) wide connector is sutible for 4.0-6.0 mm2 wire (12 - 9 AWG). 8 AWG wire can be used with special care in attention when installing. Zinc Plated.