These 4 1/2'' Galvanised Tandem Roller Brackets are to suit 4 1/2" Boat Rollers

To suit: 

4 1/2" Boat Rollers
Plate size: 165mm x 40mm x 5mm thick
Size of Spindle that goes through the middle of the plates - 195mm x 16mm dia.
Hole size suit 16mm Spindle.