Amber Class A Burette with PTFE Key Stopcock, 50mL, White Scale, 77.5cm, Borosilicate Glass

This 50mL Class A amber burette is made from heavy-duty borosilicate 3.3 glass with a PTFE straight bore key stopcock. The amber glass protects light-sensitive chemicals. Tolerance is ±0.05mL per ASTM Class A and DIN ISO 385 standards. Features chemical-resistant white printed scale with 1mL and 0.1mL graduations. The burette measures 77.5cm (30.5 inches) in length with an 11mm inner diameter and 14mm outer diameter. Each burette is individually calibrated for highest accuracy. Calibrated for delivery. Autoclavable with superior chemical durability and thermal shock resistance. Heat tolerances include a Strain Point of 515°C, Annealing Point of 565°C, and Softening Point of 820°C. Suitable for professional laboratories performing precise titrations with light-sensitive reagents.