Sew-in replacement bra back for 50 mm bands provides fresh hook-and-eye hardware for lingerie construction or repairs. Flat profile and soft backing increase comfort while maintaining a secure closure. Choose white to suit light-coloured garments or to dye for custom projects. Install with a narrow zigzag or straight stitch, securing all edges for durability. For best results, match the item to your machine or garment hardware and always test on a scrap to confirm fit and finish.