-316L Stainless Steel Construction -Top Connections (For Easy, Neat, Clean Installation) -Stainless Steel Dip Tube -Thermoplastic Jacket (Won''t dent, scratch or corrode) -Low Pressure Drop (Ideal for Low Mass Boilers) -T & P Valve, Stainless Steel Aquastat Well and Drain Valve (Factory installed-taped and doped) -2.25" EPS Insulation (Provides Less Than .5°F Per Hour Standby Loss) -Large Diameter, Smooth Coil Heat Exchangers - Prevent Buildup (Stainless Steel Coils are 25 to 30'' Long and 1/8" in Diameter) -Honeywell L4080B (Shipped Loose) -Made in the North America