1 Each. Make a statement with the refined beauty of this premium glass chairmat. Its smooth, nonstudded bottom surface allows it to be safely placed on all pile carpets and hard floor surfaces. Extremely durable, 1/4" thick, tempered glass construction provides maximum durability to protect your flooring from caster wear, spills and heavy traffic. Exceptional clarity enhances the beauty of this chairmat and allows you to show off your flooring. Smooth, easy-glide rolling surface resists indentations for effortless chair movements. Scratch-resistant top surface cleans up easily to quickly maintain its sleek appearance. Chairmat is designed to support combined user and chair weights up to 1,000 lb.