The product is a pair of vintage Tyco HO electric power pack transformers, models 899B and 899V, designed for model railroads and trains. These gold-colored transformers are ready to go with an analog control system, suitable for traditional DC analog layouts. Made of steel and manufactured in Hong Kong in 1970, these HO scale transformers are a perfect addition for hobbyists aged 17 years and up who enjoy vintage model railroads. With a 1.87 scale and AC/DC power supply, these transformers are a valuable find for collectors of model railroad equipment.