Multipurpose silicone cap designed for masking the grounding area around studs and holes. Fits over threaded studs and tube ends. The masking cap is also used as a plug to mask internal surfaces. Recommended for use in powder coating, liquid coating, e-coating, anodizing and plating. The masking cap will withstand 600° F (350° C). The high-grade silicone product is re-usable and will not migrate, melt or harden. Color-coded for easy identification. Please contact us to request a sample or to inquire about custom or non-listed sizes.