This is the replacement heating element for the discontinued Rheem RTE-13 tankless water heater. The element is 5500 W at 220V.
The RTE13 heater uses two of these elements.
Length of the copper anode element material: 8.2 inches (NOT including the brass threads)
Length from end of the brass plug with threads to end of element "U" turn: 8.7 inches (including the brass threads)
Length of the entire item, from the screws at bottom of the plastic plug to the end of element "U" turn: 9.5 inches
Weight of item not including packaging: 11.0 oz