GP101 The Great Plunger is one of the bellows design plungers which are an advance on the old style cup shape plungers. <br>This design is the most popular model. It is designed for use with Australian shaped toilet bowls as well as sinks, baths and showers. It also fits snugly over the sink waste disposal unit opening.<br>The GP101 delivers more than 5 times the displacement of a large cup plunger to clear the worst blockage. It’s an essential part of every plumbers kit.