Shadowspec UNITY Owner's Manual page 13

Figure F - 12 x Concrete Pavers
You must use 12 concrete pavers to provide ballast
for your umbrella.
This will provide the weight required for normal operation.
Not having 12 pavers in your Free-Standing base will void
your warranty.
Note:
The Pavers are not included or supplied by Shadowspec.
Size required:
Metric: 400mm x 400mm x 40mm
Imperial: 1'3" x 1'3" x 1.5"
These can be purchased from your closest building supply,
DIY or Hardware Store store.
Optional Accessories
Optional Castor Wheels
Pavers
Optional Castor Wheels can be affixed in place of
the supplied Threaded Feet. Contact us to purchase
Optional Castor Wheels.
Note: 12 Pavers
stacked in 3 layers.
13