Rectangle oil duct stick is produced from 100% wood pulp insulation paperboard,it should without any impurity which affects the electrical performance.Any part can’t crack and delaminate,bump and depth profile more than 20um is not allowed,spots and burrs are not allowed,carbonization phenomenon is not allowed,but colour difference due to density and processing is allowed.

Thickness:1~12mm
Width:4~100mm
Length:20~2000mm