Constant Level Oiler Reservoir Cap. (Oz.) 4 oz Height (In.) 4 9/16 in Width (In.) 2 5/16 in Thread Size 1/4 Bowl Dia 2 5/16 in Butyrate Plastic Capacity 4 fl oz Function Maintains Constant Level Of Oil And Prevents Accidental Overfilling For Use With - Includes Side and Bottom Connections Spout Length (In.) -