Siena Cantilver Inground Base Designed to be used where new concrete is being poured or in a soft surface like grass For cementing into the ground The inground sleeve is to be used for garden beds, lawn or any other soft surface or a paved area with sand/aggregate under the pavers. Once the concrete is set approx 2-3 days (depending on weather conditions) you can install the umbrella to the sleeve. Suitable For: Shelta Siena Cantilver Umbrella
