Shure A26X Extension Tubes for Desktop Stands, Beta56 Microphones. The Rode Micro Boompole provides ultimate boom pole performance in a convenient and portable size. Get the best deals on mic stand extension when you shop the largest online selection at eBay.com. MINT- BOGEN MANFROTTO EXTENSION POST 3104 w/STAND 3095 + MIC ADAPTER , CLEAN. $9.60 shipping. $13.95. Watch. Microphone Stand Adapter, 1-1/2" Long, 5/8"-27 & 3/8"-16 Threads Learn More Lectrosonics 26312 Thread Adapter, 1/2" Diameter, 1 3/4" Long, 3/8"-16 and 1/4"-20 Threads Desk stand extension tube extends microphone stands by 3 inches and adapts Beta 56 microphones to various mounting devices. $13.95. Accessories such as boom heads or microphone clips can be screwed on, but smaller telescoping tubes and their extension clamping fixtures cannot. To swap the extension and temination roles, (to convert a stand or boom to 3 sections instead of two for example)the tube is easily removed and reversed. Watch. Intuitive twist locks allow the Micro Boompole's three sections to smoothly extend to 6 3/4 feet (2063mm), while the ergonomic grip provides comfort during use. Realistic 20" Extension Tube Assembly For Boom Attachment Or Microphone Stand . $9.60 shipping. Realistic 20" Extension Tube Assembly For Boom Attachment Or Microphone Stand . Get the best deals on mic stand extension when you shop the largest online selection at eBay.com.