No comments needed! Immediate purchase is welcome!! YKK Efron zippers, 23-50cm, 6 pieces total 23cm Gray 1 piece 26cm White 1 piece 28cm Black 2 pieces 30cm Young Green 1 piece 50cm Black 1 piece Efron zippers are zippers with nylon elements. My parents run a sewing business, and I'm selling these to clear out inventory. These are new and unused, but have been stored for a long time. These are commercial products, so I believe the quality is fine, but please consider this before purchasing. Ka