This 5 ml evacuated tube employs a balanced sodium-fluoride/potassium-oxalate additive (final concentration ≈ 1.0–2.0 mg ml-¹ fluoride) that halts glycolysis within seconds, stabilising glucose levels for extended analysis windows. A precision-set vacuum guarantees the stated draw volume, preserving the correct blood-to-additive ratio. The clear PET barrel delivers glass-like visibility without break-risk, and the pierceable bromobutyl stopper seals securely while withstanding automated analyser needles. Internal surfactant coating minimises cell adhesion, and silanisation limits haemolysis artefacts. Tubes are gamma-sterilised, latex-free and sized for universal 13 mm holders. Supplied in rigid trays of 100 to protect vacuum integrity during storage and transport.