Extreme Max High Visibility Atv/Utv Plow Markers. These high-visibility markers are 18" high and constructed of high-density polyethylene. Flexible and virtually indestructible these plow markers will bend instead of breaking. Compatible with Extreme Max 5500.5010 UniPlow and most other ATV and UTV plows. Installation requires 5/16" hole on upper outside edge of plow for installation. Sold per pair. Two-year replacement warranty. Features of Extreme Max 5600.313 High Visibility Atv/Utv Plow Markers Includes two Extreme Max Plow Markers and mounting hardware Virtually indestructible high-density polyethylene construction 18" height for optimal sight lines without compromising plow function Easy bolt-on mounting (requires 5/16" hole); Compatible with UniPlow and most other ATV/UTV plows Two-year replacement warranty Package Contents: Extreme Max 5600.313 High Visibility Atv/Utv Plow Markers Extreme Max 5600.313: High Visibility Atv/Utv Plow Markers