Product Description: Trunnion Block/trunnion seat /spring saddle/central rotating seat Application: BPW trailer Single Point Suspension parts Material:QT450 ductile iron casting Truck Axle Bearing Housing bearing housing for various of truck Trailer Singe Point suspension parts ISO/TS16949: 2002 Competitive price our advantage: 1) Original material standard according to the original OEM technical drawing 2) Premium quality standard guaranteed 3) Long lasting and reliable working life time 4) Positive customer feedback from abroad and domestic market 5) Long exporting history to many counties in the world 6) Competitive and reasonable price 7) Able to develop & produce according to your specification with technical drawing 8) Unique Packing according to customer specification requirement We can do many other trailer parts, Axle nut, brake drum, Container twist locks, bogie axle, Bogie bracket welding assembly, spring cushion housing, central rotating seat, turnnion block/seat, spring plate, king pin nut/jasser nut, Grease cap/hub cap, spring saddle bush, wheel hub etc.