... no crack because of the inflation of ceramic fiber modules,and at the same time,the inflation of ... the anchor install inside the safety is excellent.Ceramic Fiber Modules Application: *The metallurgical,machinery,construction materials. *Petrochemicals,non ... .20.20.2Na2O+K2O ≤0.5≤0.50.20.20.2Dimension (mm) 600x240-300x100-200, 300x300x150-300The Superior Products: Refractory Ceramic Fiber Modules