The COSTUMAKERS Reversible Zipper Slider in Black is engineered for dependable daily use on medium-weight garments and accessories that use either metal or plastic molded teeth. Designed to coordinate precisely with COSTUMAKERS zipper styles 1750 and 1754, the mechanism provides true two-sided actuation so the zipper can be opened and closed from either direction—ideal for reversible jackets, vests, travel bags, and gear that see frequent on/off cycles. The body is produced from high-quality materials with a corrosion‑resistant finish to maintain appearance after laundering and outdoor exposure. Tolerances at the slider mouth are optimized to engage teeth securely while minimizing friction for a smooth, snag‑resistant glide. A compact, ergonomic tab helps users get a firm grip even with gloves. Use this slider for repairs, colour-matched replacements, or new builds where reliability, neat appearance, and reversible function are required.