Please fill out the form below for Air 3100 Or L Headphone With Nrr 21Db and get a quote for part number 300448-000 by Telex Bosch, 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 300448-000. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.