Three steps to get price and info from us , easy and quick! 1. search "hanleather" in google; 2. browse our site and get contact info of sales Eric Yuan; 3. forword Eric information and get the quotation within 12 hours . Feel free to contact me , Han appreciates that we have this opportunity to provide service. Our products have been successfully passed the testing per ASTM F-1346-91 Standard Performance and Specification. We also have the testing reports from the third party inspection bureae for main material. Our covers are made with top grade marine spa vinyl; and the tapers of cover are 4"-2"and 5"-4"; Galvanized C-Channel is installed on both sides of hinge for added strength�The foam density are 16kgs/m3, 24kg/m3, 32kg/m3 which increase the R-factor of the cover, adding to its ability to heat retention; Using high grade ***** thread and double stiched to withstand years of harsh weather and have its UV-resistance. Guangzhou Han Leather Co., Ltd locates in the largest-scale of leather manufacturing base in China - Huadu, Guangzhou City, Guangdong province with covering gross area of 11, 250 square meters, is a professional manufacturer for spa cover , hot tub cover--OEMã??ODM large leather product. which could make any customized spa hot tub covers for any shape, we offer high quality products and cheap price and long for business relationship with you.