I use it with Bosch Aquatak 135. It fits perfectly, without leaks and does not jam in the gun.

I had the old foam sprayer, I got the adapter, I installed it and it fit perfectly on the Bosch Universal Aquatak 135

It goes in with great difficulty and comes out even more difficult, with the risk of causing damage to the gun.

The adapter does its job just fine. It doesn't get stuck for me, it works normally on Bosch aq. 135

Wasted money, it gets stuck in the gun and doesn't come out as an alternative, I found the same Plug from elsewhere in plastic and solved the problem, you just have to be patient, it takes almost a month to arrive