This is a Storm physics SE. Games Bowled: 80G Plugs: None Finger Size: 31/32 Coverstock: Nano-Smooth Solid Reactive RG: 2.480 ΔRG: 0.053 This ball is very easy to throw on medium lanes, and its reaction isn't too aggressive, so I think it's easy to use for both one-handed and two-handed bowlers! This is a used item, so I would appreciate it if those who understand that would purchase it.