This is a pair of Stainless Steel Super Grip Spring Fin Straps for ScubaPro Jet Fins They feature: 2 straps per package Universal design to fit most Pro Jet style fins Easy to install and very secure Smooth, soft rubber backing for a comfortable fit Large sturdy loop for easy on and off Internal spring tension line to prevent over-stretching Measurements (unstretched): SMALL-10, MEDIUM-11", LARGE-12" High quality dive gear without the huge price-tag!