The #119 coupler will work anywhere a NO.5, #28, #38, #58, #118, #119 & #148 Coupler will work. The #119 "SE" Kadee Magne-Matic WHISKER Coupler features a All Metal Coupler, Metal WHISKER Centering Spring. The #119 "SE" Coupler may be mounted in Manufacturers cast-on coupler pockets or any of our HO-Scale draft gear boxes (except #233 30-series gear box). Includes 25 pair per package.