The Edge Skid Base Stacking Chair is very versatile, and go in any environment.The Edge has great stacking ability with contoured Seat and Back, Strong solid steel Frame. The Edge stacks 30 high on a trolley (15 high with a Seat Pad). The Edge stacks 10 high freestanding. Edge is a extensive range of multi-purpose chairs to suit many applications. Featuring a contoured, breathable backrest for comfort in prolonged use.