The file 'Solar Filter Adapter 5″ To 127 SLT 3D Printer Model' is (stl) file type, size is 125.6KB.
Picked up a 5" solar filter and adapted it to my Celestron Nextstar 127 SLT. Here is a link to the filter...https://www.amazon.com/dp/B0BTZZYNQL/ref=twister_B0CWMCMNCC?_encoding=UTF8&th=1