If a PVC cap from your boat trailer's post guide is missing, you're in luck. The C.E. Smith Guide-On PVC Replacement Cap exactly fits with your 2" schedule 40 PVC pipe. It comes wrapped in reflective decals, so you'll be better able to see your post guides while backing your boat trailer in low-light conditions. This injection-molded cap from C.E. Smith creates a tight, secure fit. Top-placed pressure-relief holes reduce loss. 2-pack. Get a new cap for your boat trailer's post guide! Fits with your 2" schedule 40 PVC pipe Wrapped in reflective decals Creates a tight, secure fit Pressure-relief holes