These single or double ended brushes are made with a 10mm thread. Choose from two polypropylene bristle thicknesses or a soft nylon version.
The 0.025″ bristle is suitable for the majority of situations. Choose 0.04″ for more stubborn deposits and select soft nylon for oil fired installations.
If ordering double ended do not forget to order a ball with a 10mm thread, which can be found under Accessories.