These SWAGELOK 6L-8TW-5-S-0 45° 1/2" Ultrahigh-Purity Stainless Steel Tubular Fittings are in unused condition and are guaranteed to be fully functional. As seen in photos, there are markings on elbows that vary. These markings are AAFTT, AAMAX, and AAIWC All elbows have ASME BPE SFF1 markings.