Spreader bars made in three sizes from anodized aluminum. Big diameter bar is 7/8,and smaller is 3/4,and they open in one inch increments Large is $54 and expands to about 48 inches,medium opens to 38 inches and is $47,and small opens to 33 inches and is $37 Also a couple of things most people will stand up,and measure between their legs,but most times these are used in bed laying down,also they are spreader bars and not meant for suspension. Prices do not include shipping.