- These Beads just make flytying 'Funky'. Can be used for lifting hackles and wings. You can use as a body and as a head ect. These are going to be very popular for the Intruder fly or the Stinger fly. Very bright colors. Fits perfektly on our FF Plastic Tube 1,8mm. Comes in 3 sizes 6mm - 8mm - 10mm.