Made of stainless steel refined spring steel strip, M sizes, to seawater . High elasticity, excellent toughness, can meet the needs of different groups of people. The buckle is made of refined 316 stainless steel, which is sturdy, , not easy to corrode, wear-, and not afraid of any damage. A harsh environment. Use anti loosening nuts to fix and connect tightly and firmly. The handle is soft and comfortable, to aging, chemical , and excellent. The insulation properties and wide temperature range, with a minimum operating temperature of -60 C, can be used for a long time at 130 C Use under conditions. The spring steel strip is equipped with a length limiting fixed rope, which effectively prevents the steel strip from being pulled or too long, which may cause damage Detachment, comfortable and reassuring to use This ankle strap is a dual-purpose strap that is suitable for different types of fins, allowing you to save time and effort Color: Black Material: Stainless Steel+Plastic Package Contents: 2 x Diving Spring Heel Strap Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.