Cost me 30 bucks for the material. It's strong and sturdy even with weight added onto my dip belt. It has a square base and is 7 feet tall. This is a picture of me using it before pulling my lat :-(
I'm in love with it though.
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I wouldn't mind a pullup bar of my own, except even with weights and such, my left arm is still pretty bad for taking my weight after I broke it in 2 places.