This standard stipulates the rubber boots (hereinafter referred to as boots) that are installed in automobile hydraulic disc brakes that use non-mineral oil-based brake fluids to prevent foreign objects, water, etc. from entering the interior.
JIS D 2611:1995 history
1995JIS D 2611:1995 Automotive parts -- Elastomeric boots of hydraulic disc brakes cylinders using a non-petroleum base hydraulic brake fluid