- Material: Made of durable hard ABS plastic, can be used for a long time. | - Size: about 6.7 x 6.7 x 5.1 cm / 2.6" x 2.6" x 2" (Length x Width x Height); Hole diameter: about 3.8cm / 1.5" (internal with adjustable cotton) | - Built-in adjustable cotton design makes it suitable for Professional interview microphone of standard size. | - Square shaped design, large place on each side to show the logo, can be engraved with PVC board by yourself or pasted by multicolored printing sticker. | - Package Included: 2 x Black Microphone Flag & 10 x Random Color Microphone Foam Cover (2-5 Colors)