PSP STRIPES - TRANSFORMER INSULATION MATERIAL Radius cheetahs machined from sheet PSP to the required size are supplied as cheetahs. These products are used as ventilation ducts in oil type transformers. 3x4 3x4x2000 4x4 4x4x2000 4x6 4x6x2000 6x8 6x8x2000 8x10 8x10x2000 Note: Production can be made in different sizes in accordance with customer demand. The minimum quantity for special sizes is 5,000 kg.