Please fill out the form below for Hearing Protector Model 27 Or 27S and get a quote for part number 2727S by David Clark Company Incorporated, please include required quantity along with expected turn around time. Our knowledgeable account manager will reply you shortly. Also check for the related parts for part number 2727S. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.