Hand made in Illinois.   The dimension of the base is 8" X 4" and is cut from 1/4" A36 plate steel and is quite heavy.   As for the supports they are for work that is 12" in diameter and measure 12.25" side to side formed from 3/8" square steel rod.      Glass in picture compliments of Cogo Glass, Morris, IL and not included.  
 
Available in 2 different cants, 6 O'clock, 5/7 O'Clock.   ( 5/7 is same piece viewed from either side)
 
Designed, cut, welded and finished in Grundy county IL.  
- No visible welds, designed to disappear and enhance your work
- Finished in black matte textured powder coat
- Also available in Stainless steel for outdoor use or other colors and sizes for an additional small fee