Bought second hand to go with a Karcher K-series jet washer. It's a quality item and expensive. This kit had a brass adapter for Karcher but there are 3 Karcher fitting types. I needed a black plastic K-series adapter. Using the ptfe tape and “o” rings included with the Meguiars kit I managed to fit it without leaks with the bottle vertical to the Karcher trigger gun unit. I tried it out in the back garden using a clear silicone grease on the adapter to make fitting and removing the snow gun easier. Hopefully, it’ll work well when I next clean the car.