1.Made of high quality spring steel with exquisite heat treatment and nickle plated. good flexibility and elasticity, Durable and not easy to get rusty.
2.Surface Finish:Anodize; polishing; zinc/nickel/chrome/gold plating, electrophoresis ,sand blasting & etc.
3.Usage:all kinds of extendable, positioning round tube and square tube for the tent, umbrella, fitness equipment, police
equipment, medical equipment, bassinet, toys, reveal frame, photographic equipment support, furniture, supplies, etc .
4.We have different kinds of sizes to choose.