NANJING ZHITIAN is specialized in the manufacturing of replacement parts for twin screw extruder. So for has more than 20 years experience. Manufacturing gearboxes,barrels and screw elements of twin screw extruder.We also provide you the refurbishment service for gearboxes and barrels. My company with strong technical force, excellent processing equipment, advanced production technology, strict inspection system and perfect after-sales service, praised by customers. Since my company’s products have been mature application in Leistritz, Coperion, Berstorff, JSW, Toshiba, Jwell, Steer and other well-known brands. NANJING ZHITIAN was established in 2006. At that time the workshop area was about 1000m2, Only five employees, That was before foreign business, all products were made for domestic market.