KDE156-25 No.156 Scale Whisker B/Pack Magne-Matic Couplers (25pr)The next evolution of model train couplers starts and ends with the Kadee Whisker series of couplers. The scale size and detail of the #58 coupler has long been popular with model railroaders, so we knew we had to offer a Whisker version. The #156 is a Long Centerset scale sized coupler with smaller head and knuckle for a more prototypical look. The #156 features an even longer lasting and more reliable design. No more fumbling with centering springs.