Acoustical wall tile wraps cylindrical or curved walls down to 12-in. diameter. Tubular by Turf Designs is digitally fabricated from PET felt, of which 60% is pre-consumer recycled, using a single color of 9-mm material, or in two-tone, 12-mm styles. Tubular comes in two standard square sizes, 11.75 in. or 23.5 in. and is offered with or without an easy-to-install adhesive backing. NRC range: 0.25 to 0.40.