Constant Level Oiler Reservoir Cap. (Oz.) 2 1/2 oz Height (In.) 4 1/4 in Width (In.) 2 1/2 in Thread Size 1/4 Bowl Dia 2 1/2 in Glass Capacity 2.5 fl oz Function Maintains Constant Level Of Oil And Prevents Accidental Overfilling For Use With - Includes Adjustable Level Setting Large Surge Chamber to Prevent Overflow Spout Length (In.) -