Description: portable studios acoustic microphone screen Used to install directly on the microphone Support microphone: a large diaphragm with a diameter of about 4.5 cm to 6 cm Recommended microphone orientation characteristics: cardioid captures your pure voices reduce external noise interfere with recording sound Specification: Material: Sponge Size Chart: 20cmx18cm/7.87inchx7.09inch Package Includes: 1 Mic sheilds Note: Please allow slightly errors due to manual measurement and different monitors.