LJXH Foldback Screw In Electric Water Heater Element with 1 INCH NPT Thread 1KW/2KW/3KW/4KW/6KW 201 Stainless Steel ljxh dn50 2 inch tubular electric water heater element 304 stainless steel boilers tube length 220v 380v 3kw 6kw 9kw 12kw