Turn your bike into a bubble machine with the Double Bubble exhaust. It sits just above the back wheel and fits onto your seat post. Then when you switch it on the battery powered exhaust releases a stream of bubbles as you ride. It includes a universal adapter, so it can be fitted to various bike sizes. It also includes a 125ml Double Bubble Pot. The Bubble Exhaust transforms your bike into an amazing bubble blowing bike. Easy to fit so you can start cycling straight away. Includes a universal adaptor to easily fit to most bikes. For outdoor use only. Size H11.5, W20.3, D22.5cm. Weight 0.6kg. Minimal assembly. For ages 3 years and over. Batteries required: 4 x AA (not included) plus . WARNING(S): Not suitable for children under 3 years old. Only for domestic use. To be used under the direct supervision of an adult. This product contains yes - bubble solution covered by tra and mibi.