We are Foshan Shunde Yijia machine co.,Ltd, who located in Guangdong of china ,as a factory, we main products are gear , worm, shaft sleeve, bush, slipper block and nut , something like transmission. all the products are made by zinc base abrasion resistant alloy for high strength which are as a part of machine. MOB:+86-13613079064 MSN:deker3515@hotmail.com fax:+86-0757-23327133 skype:dekerhuang just send ours a drawing,and we will send you a kindly quotation .