This buttress adapter with a 63mm opening fits most plastic and steel drums, for use with pump numbers 4HA27, 4HA28, 4HA38, 3BY41, 4HA36, 4HA34, 3BY42, 5XA54, 3BY48, 7P071, 4HA30, 4VCR3, and 4VCR2. Seal fixed: The adapter provides a stable connection between the pump and barrel, forming a good seal to prevent leakage.
