round four-hole mgo tube:1, with certificate: SGS mainly used as insulation material for thermocouples 2,model:the size can be customized according special requirements,also we have our standard as below:(outside diameter x inner diameter x length)Φ4x1.1x20mm                Φ5.0x1.3x25mmΦ6x1.4x25mm                Φ7x1.6x25mmΦ8x1.8x25mm                Φ 9x2.5x25mmΦ11x3x40mm                Φ12x3.5x40mmΦ13x4x40mm                Φ15x4x50mmΦ16x4x40mm                Φ17x5x50mmΦ18x5x50mm                Φ 19x5.5x50mmΦ20x5.5x50mm                Φ22x6x50mmΦ24x6.8x50mm                Φ25x7x50mmΦ26x7x50mm                Φ 28x8x50mm3,the mininum OD:1.2mm4,material:99%,99.4%,99.9%MgO power5,apperance:white color,smooth,holes distribute uniformly

High temperature ceramic tube