... , TBR Who we are?We are Zhe Jiang Sinier Guide Co., Ltd, we produce cold rolled ball screw, linear guide, cylinder linear ... -kw/2. TBI brand quality control. ZHE JIANG SENIRO GUIDE CO., LTD is the SOLE brand certificate holder for TBI brand certified ... ; ALL the TBI ball screw material GCr15 supply by Shanghai Bao steel Co., ltd The World Top Steel Enterprises. 4. TBI team provides ...