The Speedfit Pipe Clip 28mm with model number #PC28W has a push-fit design for easy installation. It is made of pex material and is suitable for central heating systems. This is compatible for connecting copper pipes.It has been manufactured and kitemarked to British Standards - BS7291: Part 3: Class S. It is lead-free, non-toxic and corrosion free. It is lightweight and flexible.The Speedfit Pipe Clip 28mm has a push-fit design for easy installation. It is made of pex material and is suitable for central heating systems. This is compatible for connecting copper pipes.