Designed to mask fittings during high-temperature finishing processes such as powder coating, e-coating, plating and more. The HJS Series is part of our Flex500 line of products designed to withstand temperatures up to and beyond 550 degrees F. HJS caps were designed to be ergonomically friendly with a soft, flexible feel and a finger grip, making installation and removal of the cap quick and easy. These caps will not bake onto the fitting. The HJS Series maintains its flexibility after masking processes giving you the option of removing it after processing, or leaving the cap on as shipping protection, allowing the end-user to remove it.