This listing is for the #4 (1/2"/13mm) haircut guide comb. It is brand new and unused without any original packaging and is an authentic Wahl product. This guide comb is for Wahl trimmer models 3205, 5598, 9653, 9686, 9816, 9818, 9837, 9854, 9855, 9860, 9864, 9867, 9869, 9876, 9876L, 9880, 9880L, 9885, 9886, 9884, 9888, 9888L, 9953, 9984, 9898, SS2L, WSS3L that use detachable parts.