A pop filter or pop shield is an anti-pop noise protection filter for microphones to reduce popping sounds. It is made of a base, telescopic arm, and two circular rings. The inner ring is where your nylon pantyhose (or any other thin material) is placed. The outer ring holds the inner ring in place by using M3 bolts.
The telescopic arm can be extended from 14cm (5.5inch) up to 22cm (8.6inch). The telescopic arm has 2 M3 bolts, which you may glue to the "nut" model.
The outer ring requires 9x M3 bolts to keep the inner circle in place. Well, to be frank, one bolt would do the job just fine. But 9 bolts make the filter more hard-rock look. You may also add M3 nuts to the outer ring, to hold all M3 bolts tight, but I guess holes into PLA are strong enough.
9x 15mm M3 bolts for outer ring
1x 25mm M3 bolt the joint between the arm and the ring
2x 15mm M3 bolts for telescopic arm
The base can be glued to the arm
3Dmax file included
Model in the picture is made of PLA, resolution 0.2mm