Tannus Armour Insert (20 x 3.0-4.0)

The first and only 2-in-1 flat protector for inner tube. Tannus Armour protects you against punctures and pinch flats, while also enhancing comfort and performance. Reduce your risk of punctures so you can enjoy riding! Reduce punctures risk Protects your rims from impact and sharp object penetration Sidewall protection