A centrifuge hub for PCR tube (0.5 mL) strips. Holds two strips of 8. Compatible with the OpenFuge. Tested up to 10,000 RPM1) Laser cut one hub square and two petals 2) Tap the small holes on the petals with a M3 thread 3) Screw together with 4 M3 screws (15-20 mm long) If you are making one for a dremelfuge, make sure the center hole diameter matches the shaft diameter on your device.