Next Floor Invincible 851 commercial carpet tiles come in 19.7" x 19.7" carpet squares with a PVC-free backing. The fiber system consists of solution dyed nylon that is 1/12th inch in gauge. Not only is it 100% PVC-free, CRI Green Label Plus and made of up to 20% pre consumer recycled content, but it also comes with a lifetime commercial warranty regarding stain resistance, backing performance, and commercial wear.