Tinksky Portable ABS Injection Molding Square Cube Shaped Interview Mic Microphone Logo(White) Color: mainly white. Material: durable hard ABS plastic. Size (L*W*H): about 6.7 x 6.7 x 5.1 cm. Hole diameter: about 3.9cm (internal with adjustable cotton). Suitable for Professional interview microphone. Square shaped design, large place to show logo, can be engraved with PVC board by yourself or pasted by multicolor printing sticker. Simple and practical design, and easy to carry.