Solid/Mechanical Flat Tappet Lifters (16)< ul>< li> Designed and manufactured using the tightest tolerances in the industry for ultra-precise construction< li> Oil metering band is milled to exact depth to prevent too much oil from being delivered to the top of the engine< li> Face of the lifter is ground to precise radius for proper break-in and guaranteed longer life Applications: Ford 8 Cylinder 239, 255 Flathead Specifications 1" Diameter - 102g Weight - Adjustable Seat Height.