4 Hook Compatibility: Designed with 3 rows and 4 hooks, with approximately 19mm hook spacing. Please measure your bra hook spacing before purchase to confirm fit. Elastic Bra Extension: Adds extra band length to help improve fit and comfort, suitable for bras that feel too tight during daily wear or size changes. Soft Nylon Fabric: Made with soft elastic nylon fabric and metal hooks, helping provide a secure attachment and a more comfortable wearing experience. 3 Colour Set: Includes black, white and nude extenders, making it easier to match different bra colours for everyday use. Practical Daily Use: Suitable for pregnancy, body changes, laundry shrinkage or general fit adjustment, helping extend the use of existing bras without replacement.