This item is on clearance due it not sitting completely flush. There is a VERY minor amount of rocking when pressure is applied to it. It should not affect performance very much. The actual product is not photographed, and all sales on clearance items are final. To be clear, there are no returns on clearance items.
Blackriver's Pocket Quarter was an on-the-go fingerboarder's dream, but size matters at some point. The Pocket Quarter XL is wider than the original so you have more options, but you keep that small form factor for easy transportation. Quarters are a must have if your fingerboard park lacks smooth transition from one end to the other, and the Pocket Quarter XL is even better for the more compact desk setups.
The Diamond Coping is Blackriver's latest development; it produces a satisfying sound but is still silky smooth to grind.