Towball Duo-Ball 1-7/8 & 50mm 1" Shank 3500kg Towball Duo-Ball 1-7/8 & 50mm 1" Shank 3...
Duo Ball - with the gradual change to the New Zealand standard many people are left with the problem of changing tow balls between 1 7/8” and 50mm in order to tow their trailer, boat or caravan.