Check the listing for details. GRIFFIN Professional Studio Microphone Boom Stand with Casters | Extended Height. Condition: New. Listed at 56.87 USD. Studio Microphone Boom Stand on Wheels By Griffin Look no further than the Griffin Studio Microphone Boom Stand on Wheels! Forget getting up on a ladder to mic up your choir, drums, cymbals, piano, or any other instrument, 'cause this product can reach up to 142 inches (that's nearly 12 feet!) in the air! And with the super stable, large diameter main shaft tubing and the telescoping boom arm, you can get the perfect mic position every time. Plus, the casters make it easy to roll around to where you need it. So go on, strut your stuff and let your inner karaoke star shine! Adjustable Microphone Stand on Wheels Specifications Telescoping boom arm length: from 46 inches to 72 inchesShaft height adjustable: 38 inches to 75 inchesMaximum height with boom: 142"Retractable leg spread area: 24 inches to 29 inchesLeg Length: 20" (each)Leg diameter: 2 5/8 cmBottom Shaft diameter: 3 cmTop shaft diameter: 2 5/8 cmBoom arm diameter: 2 cmTelescoping boom arm diameter: 1.5 cmCounterweight 4 poundsGross weight: 15 pounds