The unique connectors allow this hoop to simply twist open and twist closed without any tape or pieces to put together. This is the best collapsible hoop on the market by far. Available in Infinity Exercise at 38" 1.5 lbs and 42" 2.0 lbs. We also have the collapsible dance hoop which is lighter and better for hoop dancing and off body hooping. The Dance Pro Collapsible comes in one size at 40" diameter and approx. 1.25 lbs.