This is a dual antenna mount made for a single stand-off. The stand-off dimensions are 4 mm x 25 mm. I used a straw from a b-day balloon which is 3.25 mm O.D.. The mount's holes for the straw are 3.1 I.D.. My quad is Drone Drop's Mystery Micro 2019 which is 2.5".
3D Printing Canada TPU
I am using Frank's TPU Settings for the Ender 3 ( https://www.youtube.com/watch?v=KD7MigGaKFw )
I am using the "Touching Build Plate" setting @ 50 degrees.
I print with the the 3 contacts touching the plate. So it should look like an "L".