Earl's Swivel-Seal hose ends are for use with Pro-Lite 350, Perform-O-Flex, or Auto-Flex hose.  As the name suggests, these hose ends include a special swivel feature allowing them to be rotated after assembly in order to ensure perfect fit. The choice of major race teams the world over. The range also includes special banjo style hose ends for carburetors and other types with an adaptor built-in for use where space is at a premium.