A:AnswerIf you are talking about the clearance under the desk, the answer is YES it will fit. If you are talking about the clearance on top of your desk, then NO it will not fit. The base on top of the desk will require 2 ¼" as the base is wider on top.
A:AnswerYes, this will work with all of the Blue microphones since they use 3/8" or 5/8" threading for the screw mounts. Don't be a gorilla on the tension adjustments and you'll avoid problems other people might report with the boom arm.