One nut application. Designed for use with one back nut, unlike old style 90° thru-hull with both front and back nut. Made of hi-impact white plastic. Designed for easier application where hose is difficult to route. Not recommended for use below the waterline. Hose 1-1/2" Flange 2-7/8" Max Hull 1-3/8"

Price is per unit.Also available in a case of 12. Please call us if interested in case pricing.