Stop & Go Replacement Mushroom Plugs Replacement Mushroom Plugs are for use with Stop & Go Tubeless Tire Plug Gun Kit. Features: On the wheel repair for all tubeless tires Mechanical device (sold separately) installs mushroom plugs in tire Stem expands under pressure to fill puncture while the mushroom head seats on inner wall Sold in a bag of 50 Use with part 200-636 Note: Safety experts recommend that punctured and/or plugged motorcycle tires should be replaced as soon as possible.