Centre is approximately 5″. Comes standard with 1/2″ BSW threads to fit either Universal or Lockfast adapters on one end and a ball on the other.
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.
Diameter 28″ to 36″ – we recommend 0.1″ bristle.