The No.005 Coupler is designed to fit into n-scale trucks with Rapido style couplers. Just make sure the coil spring is available, as it is needed to steady the coupler parts.
It’s shape is of course a compromise between interoperability with other coupler designs (MTL, McHenry, …), realistic appearance, scale, stability and functionality. Function defines form is the guiding principle here.
The hole in the knuckle section allows for insertion of a magnetized 0.3-0.4 mm spring hardened steel wire that can be used for magnetic uncoupling. However we’re planning for and just testing an uncoupling pick that will be produced via Shapeways.com too.
The 10-Pack offers 10 pairs of couplers for a total of 20 single couplers. Estimated price will be around 5,95 EUR via Shapeways Shop (plus shipping).
The 20-Pack offers 20 pairs of couplers for a total of 40 single couplers. Estimated price will be around 9,95 EUR via Shapeways Shop (plus shipping).