• AAR Type "E" Coupler
• Trouble Free Operation
• Hidden Knuckle Spring
• easy to install, drop in design
• Compatible with Kadee® #1-Scale Couplers
• World-renowned quality & performance
• They just Last & Last & Last...
Includes: 1 Pair Large Offset Couplers, #911 Gear Boxes & Lids, #861 Centering Springs, .032" Shims, .010" Plastic Shims, #2 x 3/8 screws, #4 x 1/2 screws & #4 x 3/8 screws.