This design is made for 1" Wide Painter's Tape. By holding one of the handles and pushing against a surface, the tape is flattened leaving no air pockets. Refer to the gif for how to use it.
I personally printed with 10% infill, no supports, and PLA. It should be printed on its backside so supports aren't necessary as orientated in the 3D model posted.
UPDATE
Added a hole on the backside so you can cut the tape from the other side