Material: TPU+Metal Type: Key Chain, Rope with Bukble. Scene: Out walking,Hiking,Camping,Fishing,Hunting. Spring Color: Black Spring length:18cm/4.72'',Diameter:6.8mm/0.27''. Quantity:1pc Features: 1.Good elasticity, waterproof, rust-proof. 2.Within the package of stainless steel wire rope so that products with superior capacity, not easy to break. 3.Used in all kinds of tools, gage, mold, electronic digital, outdoor climbing, diving, fishing, rock climbing, and other related industries.