The linear dimensions of our sheets are nominal and they have a tolerance of +-1/8 in each direction (length and width). Thickness is 0.210 - 0.236 (6 mm) . This is commonly referred to as 1/4 thickness by most major supplier's standards. Thermoforable High/Low Temperature Resistance UPC 616043346984 ASIN B00JALH814 Color Clear Material polycarbonate Item Form Sheet Brand Name SIBE AUTOMATION Item Shape Sheet Item Weight 1 Pounds Part Number 403 Grade Rating Commercial Manufacturer SIBE AUTOMATION Item Thickness 0.21 Inches Item Dimensions 8 x 12 x 0.25 inches Specification Met Partial