... the flange portion 180 × 80 body barrel portion 160 × 60 (wall thickness of approximately 5-7mm) high 5203, the diameter 210 ... is high porosity and uniform distribution of stomata, moderate aperture, thin wall thickness (5-7mm), we compare the products of many ... special classification treatment expensive corundum powder as raw material, the thin wall and high porosity, the resistance is very small in ...