Product Catalog › Tray Ration Heater System w/ Collateral Equipment Tray Ration Heater System w/ Collateral Equipment $26,006.78 NSN: 7310-01-295-7479P/N: TRH-0100Reference page 23 of the military products catalog for a complete component list. NSN: 7310-01-295-7479P/N: TRH-0100Reference page 23 of the military products catalog for a complete component list. Add To Cart Added!