WINSINN 40mm Tiny Cooling USB Fan 5V, Micro Mini USB 5 Volt Fans 4010 Hydraulic Bearing, 1000mm/39in Cable Brushless Cooling 40mmx10mm (Pack of 4Pcs) DC 5V - 39in(1000mm) - USB June2023_cocoonwix Matte Box step up ring

Matte Box step up ring with 85mm outside diameter

it can meet your needs for all outdoor activities

Will increase the sustain and tuning stability

Welded seam cowbell with no ringing overtones

Reversible design: the reversible Type-C connector is always properly oriented

WINSINN 40mm Tiny Cooling USB Fan 5V, Micro Mini USB 5 Volt Fans 4010 Hydraulic Bearing, 1000mm/39in Cable Brushless Cooling 40mmx10mm (Pack of 4Pcs) DC 5V - 39in(1000mm) - USB June2023_cocoonwix Matte Box step up ringWINSINN 40mm Tiny Cooling USB Fan 5V, Micro Mini USB 5 Volt Fans 4010 Hydraulic Bearing, 1000mm 39in Cable Brushless Cooling 40mmx10mm (Pack of 4Pcs) Description Product Parameter Dimension 40mm x 40mm x 10mm Bearing Hydraulic Bearings Life 35,000 Hours Rated Voltage DC 5V 12V 24V Current 0. 15A 0. 1A 0. 08A Power 0. 75W 1. 2W 1. 92W Speed 5100RPM 6500RPM 5700RPM Air Pressure 2. 31mmHO 3. 92mmHO 3. 06mmHO Airflow 5. 56CFM 7. 1CFM 6. 4CFM Noise 22.