Using these metal floor flanges for supports on a pipe style shelf or rail. Good solid fixings with standard 1/2 inch BSP pipe thread. Compatible with 15mm plumbing fittings. Diameter: 6.5cm. Height: 12mm, Hole inner diameter: 18mm. The chassis of this pipe flange is thick (3.7mm) and flat, with good stability, easily fixed to the wall, floor or other surface. 3-hole flange plate design can distribute the load evenly and provide better supporting effect. Suitable for various surface applications, such as: concrete, hardwood, wood studs, drywall, etc. The floor flange pipe fittings are made of aluminum alloy, with good toughness, durability and long service life. Frosted surface, anti-rust treatment, threaded alignment. Ideal 1/2 inch threaded flange for DIY and decoration of wall-mounted industrial pipe hanging rails, wall-mounted pipe racks and floor-type pipe shelves, pipe furniture, retro shelves, retro wall lamps, pipe table legs and other artworks, etc.