Wax cast steel, not polished, this sight has a long feather finial at front and is patterned from a antique rifle photographed in Rifles of Colonial America by Dr. George Shumway. Does the feather signify the rifle's swift speed? Undercut base is .750" long, .585" wide, dovetail to .050" deep. Height from the bottom of the dovetail to the top of the sight notch is 0.29". Wax cast from malleable steel should any straighting of the feather be required. Mount the sight with the feather toward the muzzle.