Kadee HO Scale #9 Early Tyco Metal Truck Mount Metal Coupler Truck Talgo Mount Coupler for Early Tyco Metal Trucks & Craftsman Kits Metal Coupler with insulated Draft Gear Box and Lid, bronze Centering Spring and side and smaller center screw mounting hole used for truck mounting situations, similar to NO.5® Coupler. It is not recommended to use a metal coupler directly on a metal surface or in a metal draft gearbox to avoid possible electrical crossover and shorting that may cause damage. INCLUDES: (2) Pair NO.5® Metal Couplers - Medium Centerset Shank (2) Pair #634 Centering Spring NO.5® Style (2) Pair #9 draft Gearboxes (2) #622 Knuckle Springs NO.5® Metal Coupler Features: Material - Metal Shank Length - Medium (9/32") (center hole to back of coupler head) Coupler Offset - Centerset Knuckle Spring - #622 Centering System - Standard Shank Centering Spring - #634 Centering Spring NO.5® Style Head - Standard Head #9 Plastic Draft Gearboxes & Lids Features: Material - Insulated Plastic Dimensions - 29/64"L x 19/64"W x 7/64"H