... : 3/6,4/9,6/12,12/24mm Standard and Special U type Mosi2 furnace heater rod with top ... U, W, UL, WL, and another type according to your requirements.4. The standard diameters are: 3/6 mm, ... 4/9 mm, 9/18mm, 12/24mm.5. We package the products with wooden box and ... air film bubbles and according to your requirements ...