If you are looking to attach a large Prima roll bag to your scooter. Then this is the rack to buy. It fits very well. I originally bought a fold up rack and the double bar to attach one of the bottom buckle wasn't able to go over the two bars. But this rack only had a single bar and in worked great!
Ipone Scoot City 2T Oil (Strawberry)
Malossi Cam, Vespa LX50
NCY Performance Shock (280 mm eye to eye) ; Genuine Buddy
Cowl Protectors, Vespa LX 50-150 - Faco (1605)
Soft Italia Vega Topcase (33L)
Soft Italia Comet Topcase (42L)