This adapter allows you to use our smallest decoder (The TSU-N18) in practically any n-scale model! Bring the TSU-N18's 6 functions plus a narrower profile to your models. The JST-Next18 Adapter features a Next18 socket to simply plug-in your TSU-N18 decoder and solder pads for additional functionality. Dimensions: 16 x 9.5 x 5mm. P.N. 810163.