Heavy duty cast aluminium base with four legs. Screw adjustable legs. Suitable for outdoor use. Suitable for tops up to 900mm round and 800mm square at std. height. Also available in a four way base, twin base and in bar height. Cast aluminium will tend to oxidise over time causing some discolouration. Regular maintainence can minimise impact. Pitting can also occur if salt in air - does not affect strength.