Formex GK Series includes GK-5, GK-10, GK-17, GK-30, GK-40 and GK-62 with thickness ranging from 0.127mm(0.005’’) to 1.57mm(0.062’’). It’s a series of flame retardant polypropylene electrical insulation material, which is the most popular and widely used application series among the ITW Formex Family. It features superior dielectric strength, excellent moisture and chemical resistance, as well as high temperature resistance. GK Series is available in both sheet size and rolls, and as a professional and experienced converter, we can rewind and slit the GK material to be smaller size then laminate with 3M adhesives and die cut into custom shapes and sizes as requests to reduce the costs associated with fabricating, warehousing and shipping for the end user.