Centre is approximately 3.5″. Comes standard with 1/2″ BSW threads to fit either a Universal or Lockfast adapter at one end and a ball at the other.
For brush diameters in excess of 22″ consider using the long centre version.
Indicated price does not include ball end or adapter which can be found under Accessories. If you order Lockfast adapters the assumption is made that you want these fitted & pinned to the brush, unless instructions to the contrary are given on checkout.
Bristle stiffness guide;
Diameter 8″ to 16″ – 0.055″ for a medium brush, 0.07″ for stiff.
Diameter 18″ to 22″ – 0.07″ for a medium brush, 0.085″ for stiff.
Diameter 24″ to 26″ – 0.85″ for a medium brush, 0.1″ for stiff.