Threaded Bulkhead Screens feature a MPT (Male Pipe Threaded) fitting which fits into both the Standard and the Double Threaded Bulkheads as well as other FPT (Female Part Threaded) plumbing parts, Keeps your pet entertained for hours, Products to suit every need and occasion, Constructed with the highest quality materials for your pet, Made by Pentair Aquatics, SKU: RPS17071