Super strong ABS plastic with bright vacuum-metalized finish. Each stand is provided with adapter sleeves to allow use with poles of 1"; 1 5/32"; or 1 1/4" diameters. One stand now accommodates all the popular size poles. Bore Diameter: 1-1 1/4"Base Diameter: 11 1/2" All floor stands are furnished with removable sleeve inserts to accommodate smaller pole diameters. Weighted: 8 pounds. Made in the USA.