This stack rack is designed to stack your pressure washer units on top of each other. 
These are perfectly set up for Manatee Gear Drive Units, but will work with many other alternatives. 
Make sure to look at the photos and measure to ensure measurements will work for your rig or units.
29in x25in working space inside stack rack. 
Measurements:
36in (39in mounts)
16in wide
27in tall (25in inside bars)
Weights 33lb
Ships up to two stack kits per pallet. This item will not ship UPS. Freight only or local pick up.