The file 'Rail Guide For Model Rocket 3D Printer Model' is (123dx,stl) file type, size is 92.9KB.
This is the launch guide for bigger rockets using the T-slot extrusion launch rail.
https://www.amazon.com/gp/product/B001F0I3BC/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
