This Cressi Silicone Mask Strap is universal and will fit a wide array of masks. The mask strap is 5/8 wide and incorporates silicone tabs on each end to secure the strap in it s buckle. This Cressi Silicone Mask Strap offers a comfortable, wide opening and is extremely easy to install. Replace your old strap or purchase it as a spare. This is a great Save-A-Dive Kit item and will keep you diving in that unfortunate circumstance that your old mask strap breaks.