... Pin for Bolster Trailer can be 50mm,90mm.-Brake system:air braking system-Electricity:22V power for rear lights with position/parking ... :1310mmAxle: BOW/FUWA axle, X3pcsBrake dual line pneumatic brake systemWheel: 10 holes 8.0-20 steel disc wheel, 12 pcs, brand ... . Fecal suction truck, sewage suction truck,9. Concrete mixer truck,10. High-altitude operation truck,11.Self-loading garbage truck, garbage ...