"Plasticell" is an injected molded plastic raised cell sheet. Coated with 100% USA beeswax in Hamilton, IL to help bees start drawing cells quickly. The best plastic foundation available. Tested and proven as the ultimate in plastic foundation. Precise deep cell walls. Uniform exact cells. Fits 6 1/4 inch frames Foundation size is 5 1/2 inches x 16 3/4 inches. Use with wedge top bar or grooved top bar frames. Product may be white or yellow color.