The #118 Kadee® Magne-Matic® Coupler features a Metal Coupler, #634 Centering Spring, insulated #232 Draft Gear Box and Lid with side and center screw holes for mounting. Shelfs actually work. The #118 Coupler may be mounted with supplied #232 draft gear box or with manufactures cast-on coupler pockets. Manual uncoupling requires the #241 Dual Tool. The SF Shelf Coupler can be easily modified to look like the type F Shelf Coupler or H Passenger Car Coupler. It is not recommended to use a metal coupler directly on a metal surface or in a metal draft gear box to avoid the possible electrical crossover or shorting that may cause damage. Use the provided insulated draft gear box. Two pair per package.The Trainz SKU for this item is P11489771.Condition: Factory NewTCA Grade: C-9Operational Status: NewOriginal Box: YesManufacturer: KadeeModel Number: 118Scale/Era: HO ModernModel Type: Wheels, Trucks, CouplersThe Manufacturer"s Suggested Retail Price (M.S.R.P) for this item is $4.26.