Our standard is their upgrade-Manchester Tank’s 200 lb. and 420 lb. cylinders are fully-equipped with Rego Products Multi-Bonnet assembly and Presto-Tap fitting;Carbon steel construction with powder coat paint for maximum rust protection;Vacuum purged to save time and cost in preparation for customer use;Heavier material for strength, protection and longer life in the field;Large lifting lugs to accommodate large lift hooks;Collar and valves oriented for ease of manifolding;Durable, rust-proof and dent-proof HDPE (High Density Polyethylene) lids have a 10-year guarantee;Made in the U.S.A.