Quarter Scale Ruler for mills 36″ diameter or less. 4, 5, 6, and 8 quarter with imperial scale. Replacement decal for Hunter, Sawyer, Patriot, Warrior, HFE-21, HFE-30, HFE-36, Oscar-428, Oscar-330, Oscar-336, FarmBoss, H360, fits older Hud-Son mills 36″ diameter and smaller.