Quartz Glass Tube/Sleeve for Bioforce 1100/2200/4500 Pressure Filter, Genuine Hozelock part. The quartz sleeve/tube protects the UVC lamp and the electric from the pond water and enables the uv light to clear the water. From time to time the quartz sleeve can get covered in slime and limescale which is difficult to remove. A new glass sleeve will ensure that the uvc lamp can work to its full potentional.
-Fits Hozelock Bioforce 1100/2200 & 4500 pressure filters
-Internal diameter 28mm