12pcs HO Scale 1:87 Knuckle Couplers with Spring 17mm 20mm E-Z Magnetic Railway Coupling HP0787

Features

Brand new and high quality.
Compatible with all magnetically operated couplers currently on the market
Simple installation.
Integrated spring.

Specifications

Material:metal and plastic.
Scale:1:87,Suitable for HO scale.
Size: as the picture.
Color:black.

Package included

12 pcs couplers.