Upgrading your HO scale model trains? This Kadee #10 bulk pack includes 10 pairs of their famous No.5 knuckle couplers—that's 20 couplers total! They're brand new, factory fresh (C-9 grading), and made in the USA. These couplers don't include draft gear boxes, so they're perfect for installing on rolling stock or locomotives that already have compatible boxes or for custom builds. Kadee couplers are known for reliable, realistic coupling and smooth operation. MPN is 10, UPC 765484002420. Whether you're a serious modeler expanding your fleet or just want to replace old hook-and-loop couplers, this bulk pack offers great value. Improve your layout's performance and realism with these top-quality couplers. A staple in the model railroading world!