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Heavy Duty Semi Trailer Suspension for America Type Trialer Parts. Customizable Design: Supports custom size, color, logo, and specific drawing requests. High-Quality Materials: Uses 60Si2Mn spring steel from state-owned enterprises for durability. Direct BPW & SAF Replacement: Designed as a direct replacement for BPW and SAF suspensions. Complete Installation Kit: Comes with all necessary installation parts for easy setup. Versatile Axle Options: Available for 2, 3, or multi-axle semi-trailers. Professional Manufacturing: Features laser cutting and robot welding for consistent quality. 12-Month Warranty: Covers 12 months or 100,000 km, whichever comes first. Technical Support: Provides installation drawings and video guides for support.