311507 Years:1955-62 Cup (Air Cleaner)Fits:501,600,700,800,900. This air cleaner oil cup measures 4-3/4 outside diameter at the lip. The height is 3". The inside diameter is 4.450". The air cleaner oil cup is designed for air cleaners using a clamp held cup. Please measure before ordering to ensure the proper fit. Used With:311506 & 311508