http://www.yahuamachinery.com/....semi-trailer-parts/a Suspension Semi-trailer air suspension device Product description: Front bracket: tapered design, used with narrower I-beam lower wing, equipped with quick axle alignment system, airbag and shock absorber type international famous brand, joint design, stronger and better, in line with ADR certification, The bushing is made of inner and outer steel and vulcanized rubber in the middle, which is strong and durable, has a long service life, improves vehicle stability, and is suitable for road conditions in developing countries. and American. Three-axle, two-axle, single-axle front axle lifting device Packing details: wooden case, container transportation Delivery Details: Within 7 days after receipt of payment.Air Suspension website:http://www.yahuamachinery.com/....semi-trailer-parts/a