#148-25 HO Scale Bulk Pack - 25 pair #148 Whisker® Metal Couplers - Medium (9/32") Centerset Shank KAD148-25Details: The next evolution of model train couplers starts and ends with the Kadee Whisker series of couplers. When we set out to improve upon the venerable No. 5 we knew it had to be just as game changing as the original. Often referred to as the "Whisker version of the No. 5", the #148 has dethroned the classic #5 with an even longer lasting and more reliable design. We took everything you loved about the No. 5 and improved upon it. No more fumbling