● Three Precise Lengths Available: Choose the perfect spacing for your layout's curves and buffers: - 8mm - 10 mm (Ideal for closer prototypical coupling on wider radius curves) - 12 mm (Provides extra clearance for tighter curves and standard layouts) Installation & Layout Compatibility Fitting your new magnetic couplings is incredibly simple—just gently push the coupling shaft directly into your model's standard NEM socket until it seats firmly into place.