Type 304 Stainless Steel with one-piece seamless construction. Bright-polished finish. Chrome-plated plastic spindles hold rolls up to 5-1/8" (130mm) diameter (1500 sheets). Double roll model measures 12-5/16" W x 6-1/8" H (315 x 155mm). Mounting: clamps for securing to stud walls or countertop aprons. Rough Wall Openings: 11-3/4" W x 5-1/4" H x 3-3/8" min. depth (300 x 135 x 85mm).