2 Pack 20"/ 26"/ 28" 700C Bike Tubes with 2 Tire Levers, Bicycle Inner Tube Schrader Valve Fit 1.75/1.95/2.10/2.125, Bike Inner Tube for Road/MTB/Kids Bike by Hydencamm

One tube did not have cap.Tube 1. Installed on everyday mountain bike. After several inflate deflates planned to take pressured to 60 psi. At between 55-60 psi the tube exploded. A neighbor thought it was a gun shot. 911 was not calledTube 2 installed successfully and inflated to 55 psi. (Lesson learned) one day later tire is flat. Leak is about 1” on the seam and not patchableTire irons (plastic) worked well.Not user error. I have been building bikes for a long time.I have no idea how to get a refund

One of the tube had a hole which no matter what I did, I could not patch. I ended up using the old tube I had. The second tube was fine. Can't really return it as I'm using one of them, but providing guidance to others.Update (March 2nd 2022) : second tube is now leaking from the valve stem... Horrible product! Reducing stars to 1.

bought two tubes, only needed one for the back of my bike. Intstalled the first one and within one day it was flat. I rechecked the tire to make sure there was nothing to cause the leak. The area where the large hole looked like a bad finished material. Replaced it with the second one and went for a short ride and after coming back to ride again it was flat and there was another large hole in a complete different area. Again, the material was bad. Very disappointed :(

Glad I bought a 2 pack, replaced it and left it overnight. What a bummer, flat in the morning. Leaking at the seam. Won’t buy anything from them again. Just put the second one on. Let’s pray, don’t want to change 3 times.

Aired first tube up to 45, popped in my hands. Aired next tube up to 25. Popped after 20 minutes.No burs on wheel or rocks in tires. Didn't even ride the bike, it was still in the garage.