Inserts into the ground glass side-socket of an aspirator botte. Pyrex™ Borosilicate Glass Aspirator Stopcock with Ground Cone provides a leakproof seal.

Heavy-duty nylon

Regulate flow without any leaking using these fittings. Cole-Parmer™ Stopcocks with Luer Connections are available with either a male luer lock or a male luer slip.

For use with narrow neck HDPE aspirator

Hose tubing stop-cock – Simple reflux nozzle with two-sided hose nozzle.

Experience in-house fluid transfer system flexibility with this three-way stopcock, arranged in a T-shape to simply any two — or all three — arms of the stopcock with ease.

Fisherbrand™ PTFE Burette Stopckcock, Straight Through Type supplied with 8mm diameter sidearm in borosilicate glass, bore is 2mm.

For use with 25 mL Acrylic Nalgene Break-Resistant Burets.

Cowie Technology™ PTFE T-Type Stopcocks feature a pure PTFE body and plug and combine all the desirable properties of the Ultimate Laboratory Stopcock.

Develop in-house fluid transfer systems for accurate filling or dispensing. These stopcocks provide reliable, accurate liquid flow control.

Constructed of Borosilicate glass. Pyrex™ Borosilicate Glass High Vacuum Double Bore Stopcock keys and barrels are precision ground together in matched pairs for optimum performance. Each key and barrel are numbered to ensure they are always paired together. All side-arms are 100mm in length.

PTFE construction with polypropylene valve lever. Provides outstanding chemical resistance. Includes integrated hose nozzles.

Manufactured from Pyrex™ borosilicate glass with PTFE key, for superior chemical resistance. Pyrex™ Borosilicate Glass Stopcock with Key are made to a taper of 1:10 giving a combination of performance and ease of operation.

PTFE construction with polypropylene valve lever. Provides outstanding chemical resistance. Includes integrated hose nozzles.

For use with Pyrex Stopcock

These stopcocks are specially designed and carefully manufactured for high vacuum applications

Lateral Burette Stopcock for Burette includes an interchangeable glass key.

T-Bore Stopcock is constructed of PTFE and includes a nozzle.

Fits all sizes

Boro 3.3 glass class B burette with lateral stopcock

Externally operated valve to regulate the flow of a liquid.

Suitable for different usage of tubes and applications

Stopcock with interchangeable PTFE valve spindle, a cap, and a retention device.

Needle-Valve Stopcock and Spare Spindle constructed of PTFE with retention device.

Straight Needle-Valve Stopcock is constructed of glass and includes a polypropylene cap.

Straight Burette Stopcock for Burette Cap includes an interchangeable PTFE key.

PTFE Stopcock with screwings and sealings for use with compact and automatic burettes.

Ground 2-way valves without plug.

Angle valve as an inexpensive alternative.

Made of high quality materials. Each manufacturing step is tested through an extensive quality management system, based on DIN ISO 9001/EN 29001.