All steel construction. Simply insert your strips of wood into the bases and tac on your target and you're good to go. The center support will fit any length to accommodate various width targets. 
Easily comes apart for storage and transportation.  This ad is for a set (1 pair)

30" footprint $50 local pick up in the 415 bay area or $65/set shipped. 
20" footprint $40 local pick up in the 415 bay area or $55/set shipped. 

If you need more than 1 set email me and we can work something out. 
jvc707@yahoo.com