Yelloc Serviceline plugs are adapted for use as seals in hoses and pipes to prevent oils, chemicals or liquids from draining out of systems during service and repair work. They also seal systems against contamination. Reduce the risk of environmental pollution when working on e.g. hydraulic systems. Yelloc service plugs are made of silicone-free rubber, which has a high resistance to chemicals, acids and other aggressive liquids. For use in e.g. service and maintenance workshops, heavy industry, offshore, forestry, garages. All Yelloc service plugs are reusable. No tools are required for installation or removal. Designed for use in non-pressurised systems.