... packing ring, rasching ring, Ladder ring, Wire gauze packing,1.Metal pall ringa. Materialstainless steel, carbonsteel aluminum, bronze, 304L, 316L, and other ... berequested by userb. Character It has lower pressure reducing, flux is great, high efficient, comparing with other pall ring, HYPAK filling ... www.chinaptfe.com Ceramic pall ring With Excellent Anti-Acid High-Temperature Endurance Performance