Made this extender to fit over Camco Extensions(42123). My RV sits at a slight angle while parked and the Camco extension didn't drip the water far enough away from the sides. made these to slide right over, they fir snug enough but a little silicone makes sure they wont go anywhere. these add 3.25 inches to the camco pieces and move the water about 4 inches fron the RV sides.