All ductile iron repair couplings do not have a pipe stop and are designed for repairing broken pipe. The gasket bell ends are designed to push on to IPS (iron pipe size) plastic pipe. The pipe end must be beveled and lubricated with gasket pipe lube before inserting into the gasket bell end. The vertical ears on the coupling are designed to attach joint restraint products. The horizontal ears on the coupling are designed to attach spigot end fittings such as SBR reducers or plugs.