Physics specification Density Plug body 4.1g/cm3¡À0.1 Guide bar 3.9g/m3 Ati-pressing strength Plug body Guide bar 110*24h 40Mpa 40Mpa 1500*3h 60Mpa 50Mpa Anti-heating strengh Plug body 1790 Guide bar 1790 Chemical specification MgO+Al2O3>60%. Wooden cases.