PVC blue ventilation pipe, rubber, plastic bellow, industrial hose, exhaust telescopic tube, 400 mm x 1 m. : Amazon.de: DIY & Tools
9.5mm Internal Diameter, 5/16", PVC TUBE CLEAR PLASTIC HOSE PIPE, IDEAL FOR HOME BREWING SYPHONING BEER & WINE FOOD GRADE, FISH POND CAR AQUARIUM AIR PUMP - BRITISH MADE - FREE UK