Foam Cannon S V3.0 Connector for Karcher HD (HDS) Pro with M22x1.5mm female thread
Female Thread: M22x1.5mm
Rubber O ring diameter inside: 14mm.
If your spray wand to attach on trigger gun is a M22x1.5mm thread and rubber o ring diameter is 14mm, then it fits, it fits many brands of pressure washers, not only Karcher.