Inner tubes are the essential bike part. You use every day and may change it quickly. 
Save time and money with Duro tubes! 
Duro is an old tire brand from Taiwan which is an expert in tire market for over 70 years. Duro inner tubes has two different valve lengths 60mm and 80mm for both low and high rims and with same price.
Duro Inner Tubes are super inexpensive and super versatile. The wide width range enable these 700c road inner tubes to be used in many applications. Whether it's Road, Track or Fixed Gear, these tubes will work.
Don't get caught without a spare.
 
 
Brand: Duro
Color:  Black
Valve Length: 60mm/ 80mm
Fit: 700 x 18-25C
Spec: Open Tubular
 
 

Made in Taiwan.