carbon steel J blots zinc plated in silver non-standard farteners carbon steel J blotswe are metal and plastic products manufacturer and exporter in CHina, we manufacture all kinds of spring tines for Tractor, Harrow,Rake,Teeder,Baler,Harvester,Tillage,Cultivator and other agricultural machinery.we also offer S tines, Blades, Harrow discs, Safe guards, Knife sections, Gears, Bearings, Valves, ...