Home / Smoke Shop / Cleaners and Accessories / Formula 420 Cleaning Plugs Formula 420 Cleaning Plugs Formula 420 Cleaning Plugs Cleaning plugs are used to keep formula 420 solutions inside the piece to properly clean. Its easy and efficient and will make the experience of cleaning your piece with ease. Categories: Cleaners and Accessories, Smoke Shop Product ID: 15018 Spread the love Check out our other products Formula 420 Smog Out – 4oz Travel Size Lucienne Butane Supreme Fuel OCB Classic Cone Roller Machine 1 1/4 Randy’s Cigarette Roller – 79mm Zig-Zag Terpene Infused Hemp Cones – Clementine