... or loose joint ,used at shock absorber and compensate for displacement.JGD mean single ball (arch),JGD-A ... work any time ! Yes, we can do it for you!Material NO.NAMEMaterial1Inner and Outer GlueEPDM,NR,NBR, ... used on high building , bracket support or fixed equipment for pipes , or anti pull enquipment should be installed. ... force, or should install anti-pull-off device. power plant type rubber joint