Rocker spring kit tri-axle rating 4500kg

Rocker spring kits for a tri axle trailer contain six eye to eye rocker or shackle springs plus pins, bushes and all weld-on components. For on road use only with 14 to 16 inch wheels.
RSK4500-3 contains:
Qty 6 - 6 leaf eye to eye rocker springs ES6916
Qty 6 - Nylon spring shackle bush 9/16inch SB916
Qty 2 - 45mm dumb jacks DJ45
Qty 4 - Rocker arm standard RASTD
Qty 4 - Rocker centre perch long RCPL
Qty 2 - Spring hanger 9/16inch x 45mm wide extended length SH916EL
Qty 4 - Nylon shackle bush 5/8inch SB58
Qty 4 - Greasable shackle pin and nut 5/8inch SP58G
Qty 12 - Shackle plate 3inch SP3
Qty 18 - Shackle pin and nut 9/16inch SP916
Trailer rating is 4500kg.