Bore
Length
Thread
Specifications
Compare modelsNTD 4,479
Inc. VAT
The Bohlender 2-way Stopcocks PTFE GL 14, 4 mm Bore are precision-engineered for laboratory use where chemical resistance and durability are essential. Manufactured entirely from pure PTFE, these stopcocks provide nearly universal chemical resistance and reliable performance under demanding laboratory conditions. With a working pressure capacity of up to 6 bar (when used with Bola laboratory screwthread connectors) and temperature resistance from 0°C to 110°C, they are ideal for connecting and controlling laboratory tubing systems.
Note: Can also be used as expansion/reduction adapters to connect tubing of different diameters. For optimal use, please order Bola laboratory screwthread connectors separately.
The Bohlender 2-way Stopcocks PTFE GL 14 provide exceptional versatility, chemical stability, and precision—ideal for laboratories requiring reliable flow control and durable fittings.
Manufacturer P/N
E 684-14
Part Number
9.207 153
Manufacturer
Bohlender
Bore
4 mm
Manufacturer P/N
E 684-25
Part Number
9.207 155
Manufacturer
Bohlender
Bore
8 mm
Manufacturer P/N
E 684-18
Part Number
9.207 154
Manufacturer
Bohlender
Bore
6 mm
It are precision-engineered for laboratory use where chemical resistance and durability are essential. Manufactured entirely from pure PTFE, these stopcocks provide nearly universal chemical resistance and reliable performance under demanding laboratory conditions. With a working pressure capacity of up to 6 bar (when used with Bola laboratory screwthread connectors) and temperature resistance from 0°C to 110°C, they are ideal for connecting and controlling laboratory tubing systems.
_0.png&w=3840&q=75)
1 min read
Cleaning laboratory glassware properly is essential for accurate, safe, and repeatable lab work. This guide explains how to remove stubborn residue from beakers, flasks, bottles, volumetric glassware, and other lab glassware, including grease, dried salts, biological residue, stains, and burnt deposits. It also covers safe cleaning methods, common mistakes, drying and storage tips, and when damaged glassware should be replaced.
1 min read
Pipette calibration helps laboratories confirm that liquid handling results remain accurate, repeatable, and traceable. This guide explains how pipettes are calibrated to ISO 8655 standards, including gravimetric testing, environmental control, correct tip selection, volume testing, calibration records, and common mistakes to avoid. It also covers when to use in-house calibration and when an external calibration service may be more suitable.
1 min read
A free molarity and dilution calculator covering four essential lab calculations: C1V1=C2V2 dilution (solve for any unknown), molarity from mass, mass from molarity, and serial dilution table generation. Includes worked examples, a concentration units guide and step-by-step preparation instructions for every result.
1 min read
Free online buffer preparation calculator. Select your buffer system, enter target pH, concentration and volume, and get an exact lab-ready recipe with reagent masses and step-by-step instructions. Covers PBS, Tris-HCl, sodium phosphate, acetate, HEPES, MOPS and more.
_0.png&w=3840&q=75)
1 min read
Laboratory balances are essential weighing instruments used to measure samples, reagents, powders, chemicals and materials with accuracy and consistency. They are commonly used in research, education, quality control, pharmaceutical testing, food testing, industrial laboratories and general scientific workflows.
NTD 4,479
Inc. VAT
