Comfortable Polyfoam Cushion with Hundreds of Vinyl Color Options Including Premium Upholstery Standard Features Durable 16” wide, 4” thick polyfoam seat Pneumatic height adjustment 5 year warranty VRB-1-C – Operator’s Stool Backrest 16” x 10” with aseptic shroud Durable ABS base Glides standard; casters optional VR-1-C – Operator’s Stool Stable five-star, 25” reinforced ABS base Glides standard; casters optional VRBM-3-C – Operator’s Stool Large 20” diameter adjustable chrome footring Glides standard; casters optional