Burette with Screw Type Needle Valve PTFE Stopcock. Burettes meet ASTM E-287 Class A specification & USP standard with Individual work certificate, Serially numbered.
Burette with Straight Bore PTFE Key stopcock Schell Bach Stripe. Accuracy as per AS DIN 12700 ISO 385 With Individual Work Certificate, Serially numbered, (Waiting time 30-seconds).