Microfiber Madness Incredipad XL exterior These have a female 3/4"

These have a female 3/4" NPT thread that goes to a Prevost 1" pipe

This fitting takes a 3/4" NPT (Male) thread and converts to a 1" Prevost pipe

Back hole is 2 3/8" and the front hole is 6 1/8" off the back wall

it's not impossible to figure it out on your own

Microfiber Madness Incredipad XL exterior These have a female 3/4"Description The best washing pad in the world. So here is the whole story on this pad. I've used the Adam's Synthetic Wool Pad for close to ten years. I strayed from it, chasing something better a few times, but I always came back to it. I never had much of a problem with scratching or digging out stuff that sticks in the pad, so it served me well. For some reason I headed down the path again to find something better. I bought and tried a bunch more