Colinktool ZLinkin Heavy-Duty Roller Guide-On System

Custom-formed 97° arms and 13" roller assembly; up to 14" (3" trailer frame) or 16" (2" trailer frame) of horizontal adjustment
Includes one pair of Heavy-Duty Roller Guide-Ons with an easy, bolt-on installation that fits bunk or roller-style trailer frames up to 3" wide x 4. 25" tall
Zinc-coated for freshwater corrosion-resistance, not intended for use in saltwater or brackish water
6" bolt kits are available for trailer frames up to 5" tall

Heavy-Duty Roller Guide-On System
Heavy-Duty Roller Guide-On System provides a worthy assist while getting your boat on and off its trailer, helping you load and unload faster and safer. Attached to the trailer frame, the pair of guide-ons helps center the boat on the trailer, preventing wind and currents from derailing your loading attempts, while the uprights provide a sight line at deep launches and in murky waters. The rubber rollers provide a soft touch for your boat, while its steel construction withstands nearly anything you can throw at it.
Features:
Use with bunk and roller style trailers with frames up to 3" wide x 4.25" tall
Heavy-duty zinc-coated steel construction
Designed for freshwater use only
Mounting hardware included