Delivered quickly as promised. Item is one of a kind and works great. Just make sure to orient it in the chuck as pictured on the listing page.
I order these three at a time. When they are new, they work like a champ, but as the rubber wears down, they lead and do not hold the stem tightly and securely. I attribute that to the ribbed stems on the Conti tubes I use. I've used smooth stems in the past once in a while, and I bet the rubber would last longer if I used them exclusively. Average life expectancy is about 12-18 months, pumping up 2x tires 3-6 times per week. When they are new, they are great!
Excellent replacement. Good fit in Chuck and performance is fabulous.