This is a 100% Small Business Set-Aside for a Firm-Fixed-Price procurement of a specific brand-name TESCOM valve/regulator, part number 26-1064-18-866. No substitutions or alternate products are permitted. The contractor must deliver the exact TESCOM-manufactured component along with a Certificate of Compliance and Mercury-Free documentation. The requirement is open only to responsible small business vendors capable of supplying this exact part.