Zhejiang GSD Leisure Products Co.,Ltd,,establish in 1995.At present, our daily turnout exceeds 3,000 sets trampolines (around 10 x 40' HQ); Focusing on producing the best trampoline in the world, we do only manufacture one product, trampoline, only!All GSD&Jumport trampolines are made of finest materials, by skilled craftsman, manufactured to exacting tolerances. Utilizing proven manufacturing techniques and procedures assures quality, durability, accuracy and value of the products .We test and inspect continuously throughout the entire manufacturing process to assure quality and consistency. We own innovative trampoline Lab, unique multi-purpose test system, 4 roads monitoring springs, jumping mat and frame tubes with different loads. Our facilities and manufacturing procedures have already received ISO 9001 certification. All GSD&Jumport trampolines received GS certificate from TUV, Intertek etc. We are also a member of BSCI Europe.We hold that "Customer is always right!"