Clear acrylic trapezoid, with one flat surface frosted to enhance visibility. Bases are 89mm, and 40mm. Faces measure 47mm, and 35mm. Additional Info: Clear acrylic trapezoid, with one flat surface frosted to enhance visibility. Bases are 89mm, and 40mm. Faces measure 47mm, and 35mm. Package Size(L x W x H): 3.5 X 2 X 0.5 (IN) Categories: Optics, Prisms HTS Code: 9001.90.5000 UNSPSC: 3.12415e+007 Country Of Origin: INDIA