... /6, 4/9, 6/12, 9/18,12/24 etc. Type: I,U,W, Pole, and U-right angle shapes, etc ... , All characterized by long life and consistant perfomance.1. Specification:Type:1700C/1800CDia:3/6, 4/9, 6/12, 9/18 ... , 12/24 etc. Type: I, U, W, Pole, and U-right angle shapes, etc ... , enabling an optimized element design for each particular application U type mosi2 heating elements for furnace