Stainless Steel Spring Kit: This package includes 5 springs and 5 spring protective sleeves, which is a fully equipped pool cover replacement kit for your daily use and replacement.GOOD TENSION STRENGTH - These inground pool cover springs are 8 inches long stretched expanded and 7 1/2 inch inches long compressed during installation, which fits swimming pool cover straps with a width of 1 inch or smaller.High Quality: The pool cover springs are made of heavy duty 304 stainless steel, which are sturdy and have great corrosion resistance to work even in bad weather. The spring protective sleeves are made of high quality vinyl, the thicker material can the spring better.Suitable for all major Pool covers manufacturer's most brandWidely Used: pool spring are universal that are applicable for all kinds of pool covers, trampoline, mechanical equipment, toys, circuit breaker .Color: silver+grayMaterial: plastic + stainless steelPackage Contents:5 Pack Stainless Steel Springs5 x protective sleevesOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.