# 31 Coupler Long Underset Shank
The #31 Kadee® Magne-Matic® Coupler features a very strong plastic insulated coupler, #621 Torsion Centering Spring & insulated #233 Draft Gear Box.
30-Series Kadee® Magne-Matic® Couplers are designed for body mounting either above or below the mounting platform, with or without Draft Gear Box Lid and with Draft Gear Box Lid either on top or bottom.
Note: The 30-Series Torsion Spring can be mounted either below or above the coupler shank, but must always be mounted between the Coupler Spring Lid and Draft Gear Box.
Two pair per package
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