PVC Rigid Round Pipe 12mm ID 16mm OD 0.2m Transparent High Transparency | eBay
RS PRO PVC Flexible Tubing, Transparent, 12mm External Diameter, 25m Long, 81mm Bend Radius, Applications Various - RS Components Vietnam
Siphon Tube 12mm ID x 15mm OD (PVC Clear) - Priced per Metre
12mm ID x 15mm OD 2 Metres Clear Flexible PVC TUBING Water Pipe Food Grade Hose PENTECH Moulding Brand - Dispatched by First Class Post : Amazon.co.uk: DIY & Tools