70mm Towball suit 4.5 tonne heavy duty Electric Couplings.
- CRN45125 (No CRN means the towball is not legal for use on Australian roads and highways.)
- 32mm Shank
Trailers over 3.5t towing capacity made after 2009 using 70mm balls must comply with Australian standards and be ADR Approved.
Towballs over 3.5t must be tested for 2,000,000 cycles at the full, rated load.