Applicationfor 2" Wide Slipper Springs Features The hanger kits need to be welded directly to trailer frame Slipper springs are used on heavy duty axles New in box Warranty: one year for any manufacturing defect Quantity 2 x 12" equalizers 2 x front hangers 2 x center hangers 2 x rear hangers bolts 2 x Equalizer bolts 8 x shackle bolts with nuts Note- Please feel free to contact us for whatever we can help. - Instruction is not included. Professional installation is highly recommended.