This siphon type drum pump has a unique bellows action which permits manual pumping to higher levels and siphoning to lower levels. Easily attaches to drums with 5.1cm (2") IPS female threads. Maximum siphon flow is 19L/min. (5gal./min.). Polyethylene construction. (MTN 4A) Note: Avoid petroleum-based fluids and temperatures above 52°C (125°F).