Boat Trailer Leaf Spring: Tinmy leaf spring factory is one of leading manufacturers in China who can make a full range of conventional leaf spring spring, parabolic leaf spring and Z-type leaf spring which are used in heavy duty trucks, semi-trailers, boat trailers, light duty trucks,buses and cars. Our factory yearly turnout is more than 90,000 Tons. The lead time is within 4 weeks. Controlling all of the products is through certified TS16949 and ISO 9001:2000 system. TINMY45*7,45*6Leaf Spring,Trailer leaf spring, Truck leaf spring, Auto leaf spring,Suspension leaf spring 1)Marerial:SUP6,SUP7,SUP9,SUP9A,SUP10,SUP11,SUP11A; 2)Type:Conventional,Parabolic,Z-type,Galvanized,Boat Trailer,Small Trailer,Multi; 3)Certificate:ISO9001/2000/TS16949 control system.; 4)Year Turnout:More than 90,000 Tons; 5) Lead Time:Within 4 Weeks after receive TT deposit or LC ;