3 large foam windscreens. Includes "10 Tips for Better Audio Recordings." Perfect for desk top microphones , ham radio mics, driving instructors, , fitness classes, including bike or spin class, aerobic or step classes, body pump, etc.. Also good for computer gamers, telephone headsets, tv studios--anyone who uses headset microphones or small desktop mics.. H: 3.8cm, 1 1/2 in; W:2.9cm, 1 1/4 in.; opening: 1.1 cm, 1/2 in IMPORTANT NOTE: If you force a foam windscreen on a microphone that is too large, it will rip. If your microphone is too small, it will fall off. Please review the comparison chart in images to find the correct windscreen for your microphone. If the windscreens don't fit or you are unsatisfied for any reason, just return them via Amazon for a full refund. See images for more size info., comparison chart.