Universal 4kw Titanium Heater Element 120/240v with epoxy potted bulkheads. This is a double bend flow thru titanium heater element. It has a titanium coating to prolong the life of the element and gives you superior resistance against corrosion, damage against hard water & chemicals. It measures 1.25 inches from terminal end to terminal end, overall length is 10.0 inches. It is 4kw when using 240v and 1kw when using 120v. The front of the element bends slightly downward near the end terminal.This is designed to fit a large number of heaters including the Balboa M7 heaters. All hardware and o-rings required for installation are included.Includes a 1 year manufacturers limited warranty free of defects.Note: We advise all hot tub owners to have their water tested bi-weekly, to help insure an even longer life for your spa component.