The pool cover springs are made of stainless steel material, sturdy and strong enough to withstand the bad weather, very durable. The springs sleeves wrap the spring to protect the spring, to extend the lifespan of these springs, and to prevent the spring from scratching your deck. The springs are easy to install, and can be easily removes, and they are stretchable, very practical to use. Features -Color:Black -Material:Stainless steel, PVC -Size:18.00X3.50X3.50cm/7.07X1.38X1.38in - Made of prime stainless steel, these pool cover springs are not easy to rust, and can withstand a long time of use in winter. - Our springs for pool cover are simple in design, easy to use, and also suitable for other equipments, such as trampoline. - Our PVC spring sleeves can extend the life of your springs by protecting them from the damage of heavy weathers. - The spring cover not only protects the spring, but also prevents the spring from scratching your deck. - You can buy this set of pool cover springs with sleeves at an , a perfect choice for you. Package list: 5 × Pool Cover Springs 5 × Pool Cover Spring Sleeves