Letheroid Paper from Germany in sizes of 0.15, 0.20 and 0.25mm, Polyester Paper, Nomex, Sleeves etc. Calender Transformers Board Sweden Used in transformer industry and related applications Pre-Compressed Boards Transformer Board from China in yellow, orange color in sizes of 0.75, 1.5 and 3mm and in red color of 0.75, 1, 1.5 and 3mm sizes. Vulcanized Fiber Sheet form and Roll form Japanese Make used as a packing material.