1. Extrusion graphite block 2.PSK.TSK.GSK. 3. Grain size : 0.8 mm.2mm.4mm. MATERIAL: Extruded Graphite,Molded Graphite,Isostatic Graphite,Vibration Graphite,High density and high Flexural Strength graphite material . (Die molded graphite),High pure extruded graphite,Special carburizing treatment graphite materialCHARACTERISTIC :1.perfect sealing performance , long service life , low maintenance2. ...