We are offering pre-compressed board comes in two grades i. E. Medium density 2. 6 & high density 3. 1. medium density 2. 6 is a medium density precompressed board made of 100% electrical grade unbleached sulphate softwood pulp for use in power & distribution transformer upto 132 kv class high density 3. 1 is a premium quality high density precompressed board made of 100% electrical grade unbleached sulphate softwood pulp for use as insulation of power transformer above 132 kv class. Standard thickness : 1mm , 1. 5mm, 2mm, 3mm size: 2200mm x 1140mm 2400mm x 1000mm