GP-7, GP-9, GP-18 Detail Sets: Fits Life-Like's N-scale GP-18. Includes 16 intake grills in two styles, 16 fan grills in three styles, two pairs of lower side skirts, and 32 sets of louvers for detailing a GP- 18 or backdating it to a GP-7 or GP-9. Parts for two locomotives. Relief etched in 008" brass for extra detail.