This is a tip out tray for sink base cabinets. It's made in three pieces for ease of printing and resizing, in it's current format will produce a tray around 11" long.
Use these hinges to attach the drawer front to your cabinet.
https://www.amazon.com/Rev-Shelf-LD-0220-50SC-Soft-Close-Sink-Front/dp/B018A36II6/ref=sr\_1\_3?crid=2DPBA20JC0RFO&dchild=1&keywords=tilt+out+tray+for+sink+cabinet&qid=1588264232&sprefix=tilt+out%2Caps%2C198&sr=8-3
The author marked this model as their own original creation. Imported from Thingiverse.