Designed to fit in-line

Pumps can run dry without damage

plus you can watch downloaded video

is one(1) mm

Comes with mounting pads

Beckson - Rain Drain Opening Ports and Accessories/ NICKEL-PLATED BARREL NUTS , Part No BB187-02/25 Schneider Electric Designed to fit in-lineRain Drain Opening Ports are made of white ABS plastic with clear plexiglass opening window for hulls upto 1 3 4" thick. The Rain Drain port design can drain while tipped 24. INCLUDES an inside finish ring and screen. 512 hole size is 5 1 2" x 12 1 2" 414 hole sizeis 4 1 2" x 14 1 2" 714 hole size is 7 1 2" x 14 3 8" . Nickel Plated Brass Barrel Nuts arerecommended for thru bolt installation of ports deck hardware and other installations Portlight