1, with SGS approved,made by the mixture of MgO powder andalumina powder.

2,model:the size can be customized according specialrequirements,

Below is Our standard sizes:  ( ID*OD   mm)

4*6mm  4*7mm  5*8mm  6*9mm        7*10mm 7*11mm

8*12mm    8*13mm       9*13mm       10*14mm

11*16mm  12*17mm       13*18mm    13*19mm

14*19mm   15*20mm     16*21mm       17*22mm 18*23mm 

19*24mm 20*25mm        21*26mm         22*27mm   23*28mm  24*29mm......

3,packing:wooden box.

4, ,it can be used as a insulation material at thebottom of a magnesium oxide tube