KES Lead-Free Faucet Supply Line Adapter 3/8-Inch Compression Male to 1/2-Inch NPT Female Converter 2 Pack, SOLID Brass, PJ18-P2 SOLID BRASS: Manufactured from quality brass, ensuring quality and longevity. LEAD-FREE: Lead content is less than 0.25% CNC advanced manufacturing, precise threads 3/8-in compression male to 1/2-in NPT female threads