Check the listing for details. New Lightspeed Aviation, Mach 1 Wind Screen (Mic Muff) p/n A140. Condition: New. Listed at 9.99 USD. New Lightspeed Aviation, Mach 1 Wind Screen (Mic Muff) p/n A140 This wind screen (mic muff) fits the legacy Mach 1 headset model. All Lightspeed headset mics are calibrated for use with a wind screen. Lightspeed recommends replacing wind screens (mic muffs) every 18 months to ensure peak performance and comfort. FREE SHIPPING in the USA with tracking number. 721For International Shipping* we use eBay's Global Shipping Program (Courier Service) for safe, fast and secured worldwide shipping. *International Shipping is the cost of shipping the item to your destination country. Please, be advise this cost does not include any import duties or fees your country's Customs might impose on the importation of this item. We, have no control on the import duties or fees or the amount.Thanks for landing @ World Pilot Supplies, an Authorized Lightspeed Dealer