This is 2 Pairs of Kadee?« Magne-Matic?« #146 "Standard" Head Metal "Whisker" Couplers. Suitable for Ages 14 & Up.FEATURES: Long (25/64") centerset shank Metal coupler, metal whisker?« centering spring, insulated draft gear box and lid Coupler may be mounted with supplied draft gear box or with manufactures cast-on coupler pockets Designed for standard height mounting platforms 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 Insulated draft gear boxes Coupler shank has the same dimensions as the No. 23, 33 and 153 coupler shanks Instructions INCLUDES: Two pair #146 "Standard" Head Metal "Whisker" CouplersREQUIRES: Assembly Coupler pliers (KADU0237) Hobby file Grease-em (KADU0231)SPECS: Scale: HO 1/87KadeePart KAD146