2 Pcs Black Plastic Dual Head Bike Bicycle Pump Head Nozzle Hose Adapter Connector

This replaced the head on an old electric pump that used a screw-on adapter for presta valves. This head works for both.

I ordered a pair of these pump head chucks and tested them upon delivery. First, the screw-on outside clamp is a very tight fit for many standard floor pump hoses. I measured it at 0.34" I.D., and my hose at 0.35", so I figured it might be somewhat snug, but it was indeed a very tight fit.But that's not the big problem. After some effort, I managed to install one of the chucks on a floor pump hose. Worked fine on both Schrader and Presta valves. Yay. But I figured I'd better check the other one in the pack just in case. I installed the other one on the hose and tested it, and it worked fine on Schrader valves, but it leaked badly on Presta valves, making it unusable. Not good.Logged back into Amazon and requested a refund. Amazon instead suggested a replacement set, and I said 'why not'. In less than 48 hours, the replacement pair was delivered. Good.And so I tested the second replacement pair... and guess what? One worked fine, and the other leaked badly in Presta mode. Seems to be a pattern here...And so the two bad ones are soon on their way back to Amazon, and the two good ones are in service on floor pumps. So at the end of this, I have the working pair I expected and paid for. But there was some unexpected effort, including the installation, testing time, and dropping off the return.

This is the one. I have tried a few higher dollar pump heads only to be disappointed. This one installed easy. When the lever is up it is open. That makes it easier to disengage. You get two to a pack and yes they probably could have been made out of more durable materials but they are affordable and easy to replace. For me they are proven...

Easy to install

Not sure how this will hold up since it is all plastic, so I cannot comment on that. But, installation may or may not be possible depending upon the hose material of your inflator. Mine, like most, is a rubber hose with a nylon braid around it to reinforce it for high pressure. This made it a bit too large for the white nylon securing "nut" of this head. I had noticed upon removing the old head that they had wrapped the braid with a piece of tape to hold it together, so I replicated that before cutting a fresh end.Despite these preparations, I was unable to get the hose through the nut. I finally used a heat gun to warm the nut and used a conical item to gently enlarge that nut by a bit, then still struggled but managed to get the hose through. But, this was still at the limits of the nut since the threads are only slightly larger and the hose gets enlarged after going over the barbed fitting.In testing operation, on a rather low pressure Presta valve, it worked well - attaching without loss of air, holding during inflation without leaks, and removing without loss of air. On a Schrader valve, each time I tried to attach it, I got quite a bit of air loss. Maybe I am just expecting it to go on farther than it needs, but it didn't seem to have a very tight fit. But, after clamping down, it held leak-free and then I was able to remove it with little loss of air (but some).So, just be warned it may be a challenge or even impossible for this to fit your hose. I'd prefer a larger nut with some shims to handle a range of smaller hoses. But once installed, it should work okay.

Locks on nice. Required a little manipulation to get the nut on the hose.

They sell them in pairs because one may not work! In my case both worked a couple of times and then stop working. Buy the SKS replacement head if you use presta valves. It's worked flawless!

It worked on an old Bell windstorm pump I have. Only used it twice so far so can't say as to the durability. But am pleased that it worked on it and the price was very reasonable!!