As a professional trailer connector manufacturer, TSY (Taiwan Sheng Yeo Inc.) endeavors to produce high quality products. Companies from worldwide have trusted TSY with their manufacturing needs since we were founded in 1984 and we continue to work hard at earning trust every day. With the change of the market, demands for products quality, on-time shipment and well service providing are increased, that are the reasons that companies turn to TSY as their manufacturing partner. We understand the competitive nature of our customer's business and we are sensitive to what help them stronger. We firmly believe and practice the principal that our customers' successes come first. That is to say, their success is our success. As we enter into the new decade, TSY is committed to providing new service - delivery and develop whole new products with multi-function and diversification. At the same time, we will continue to strive to meet our customers' needs and to exceed their expectations. We believe we exist because of our customers and we honor their trust in allowing us to support them.

Manufacture of trailer parts include (1) accessories- 7 -5 adapter w/ blue cables, bracket for 4/5/6/7 pole conn. (2) adapters- trailer adapters, 4 pole round plug to 4 pole flat cons, adapter 7-4 with coil cables, adapter 7-6, adapter 4-4, adapter series. (3) breakaway switches- battery cases, chargers. (4) converters- trailer converter 5-4H, trailer converter 5-4, trailer converter w/ 4 pole female conn., trailer light converters. (5) connectors- trailer connectors, connector series, 4 ( 5, 6, 7) pole conn. sets, 6/ 7 pole conn. kits. (6) T-connectors. (7) testers- adapter 4 pole flats, 7 pole testers. (8) wiring harnesses- 3 pole flat conn., 4 pole flat shrouded conn., 4/ 5 pole heavy duty conn., 4 pole flat connectors.