FlipStix Galvanized Steel Hanger & Washer. A unique insulation hanger with a self stick base. One fastener can be used for insulation up to 2? thick. Optional extension (FSG-E) allows for use on up to 6? thick insulation or wrap. It is the only fastener available in galvanized, aluminum and stainless steel. Insulation can be secured simply by bending the tip of the extended pin or using supplied washers. Flipstix can be used on any clean metal or painted surface and will withstand temperatures of up to 175?F.