3/8-24 female end can either screw into your low pressure hose male end fitting or the first stage on a low pressure port or any other threaded area using this thread size
The other end "9/16/18 male end will accept low pressure hoses or other threaded areas using this thread size
You can connect 2 low pressure hoses together with this adapter!
Perfect little step off your first stage for clearance issues!
We use a viton o-ring on both ends of this adapter!
This is made from solid brass and than electro-plated to give you a good looking adapter and very durable!