Store › Trailing Arm Duplicator Replacement Tips Image 1 of 2 Image 2 of 2 Trailing Arm Duplicator Replacement Tips $24.95 Tip sizes are 1/2”, 5/8” and 3/4”. Tips to be used on existing radius rod duplicator. Quantity: Add To Cart Added! Tip sizes are 1/2”, 5/8” and 3/4”. Tips to be used on existing radius rod duplicator.