ID 3/8" / OD 1/2" 3 Ft 1 Meter PVC Clear Hose Tubing Aquarium Air Tube Pond Garden Water Delivery Go to amazon.com Related posts How to buy the best aquarium pump tubing? FeatureInner diameter 3/8" (10mm)Outer diameter 1/2" (12mm)Made in KOREAHigh QualityLength : 3 Ft (1M) DescriptionInner diameter 3/8" (10mm) Outer diameter 1/2" (12mm)