Metallic VSP Ring 1)professional manufacturer 2)good quality with reason price 3)ISO9001:2000 4)size:25-76mm product Metallic VSP RingOwing to its thin wall, high void and capacity, low fluid resistance, and heat & corrosion resistance, metallic packings, include carbon steel or stainless steel, applied to handle the thermal-sensitive, hard to separation and easy carbonized materials in the ...