https://adultsmart.com.au/collections/adjustable-spreader-bars
Buy Adjustable Spreader Bars - Multi Sized Options – Adultsmart
Adjustable spreader bars offer customizable length from compact to wide spreads. Shop by length range, increment precision, and lock security.
adjustable spreader barsbuymultisizedoptions
https://www.theamericangym.com/proddetail.asp?prod=405-390
The American Gym: E - Elite Kids Adjustable Spreader Uneven Bars - AAI, KidsEquip, 405-390