92% SI3N4 PROTECTION TUBE DELIVERED TODAY Dec 06, 2021 Today we delivered 20pcs of 800mm length si3n4 protection tube to Qingdao port. Previous: Graphite Shaft&rotor Will Be Delivered This Weekend Next: China's Industrial Silicon Production in November Was 300,000 Tons, An Increase Of 10% From The Previous Month. You May Also Like Spiral Heating Element Alumina Ceramic Crucible Ceramic Heating Beads Ceramic Heating Element Aluminum Titanate Riser Tubes 95% Aluminum Ceramic Pipe Tube