Plastic Support Screw-On Clip 15mm Black | 4BoatsScrew on plastic clip designed to support 15 mm (0. 59 in) tubing and small rails, finished in black for a discreet appearance. Screw fastening secure, low profile mounting Holds 15 mm (0. 59 in) tubing Black plastic resists corrosion Smooth black finish for discreet appearance Fits handrails, guard rails and small tubular fittings Easy to fit with standard screws (screws not included) Suitable for marine and outdoor use; simple to install and low