Umbrellas Base that is made for a half umbrella. This item is not meant to be used with a regular umbrella. Product Info 40 lbs Anti rust primer Designed for 772 half wall umbrella Protective rubber feet 24” base tube available for commercial use Specs 040SQ - Used with half wall umbrella 13 x 22 FAQ Q What size base is recommended to free stand umbrella?A Galtech recommends a 75 lb. minimum base for all free standing application. Q Why is the 040SQ base rectangular with the tube at the edge of the base?A The 40lb base is designed for half wall umbrellas. It can be placed flush up against a wall. Q How is the tube attached to the steel plate base?A The tube is secured via 4 stainless steel screws that are screwed into the plate. Q Will the steel plate bases rust?A All steel plate bases are primed with anti rust coating to prevent rust. Q What is the benefit of the rubber feet on the bottom of the base?A The protective rubber feet prevent the metal base from touching the surface of the patio. Please call 403-258-2506 for availability at our Calgary location.