Prime USA Scales optional upgrade to floor scale ramp to roll on and off the Cambridge 660 series floor scale. The standard floor scale has either a 3″ or 4″ (depends on model) and will not allow access for rolling onto the scale. The optional ramp will be the same width of the floor scale and allow users to roll up onto the scale. The ramps can be used for dollies, carts, pallet jacks, motorized pallet jacks, forklifts, and many other rolling items. This price is for the upgrade only and does not include scale.