Lab supplies

25mL Class A Borosilicate Burette — 2-Pack with Glass Key Stopcock

3.4 5 reviews 1 min read

25mL Class A Borosilicate Burette — 2-Pack with Glass Key Stopcock

Product description

Included: a pair of 25 mL Class A borosilicate glass burettes, each containing precision graduations at 0.1 mL increments and certified to a tolerance of ±0.05 mL.

Material and dimensions: made from laboratory-grade borosilicate glass for high thermal and chemical resistance. Each burette stands about 22.5 inches tall and is fitted with a glass key stopcock for direct flow control.

Operation and care: the glass key stopcock is built for smooth, fine adjustment of liquid discharge but performs best when lightly lubricated and kept clean. Thorough washing is recommended before first use to ensure accurate readings and safe handling.

Applications: designed for analytical work in teaching labs, research settings, craft brewing and winemaking, and at-home experiments. The two-unit set provides redundancy or parallel measurements for educators, hobbyists, and professionals.

Pros

  • High-precision Class A graduations
  • Borosilicate glass resists heat and chemicals
  • Includes two identical burettes

Cons

  • Stopcock needs periodic lubrication
  • Requires careful initial cleaning
  • Fragile glass — handle with care

VerdictAccurate, laboratory-grade 25 mL burettes that deliver fine measurement resolution and chemical resistance. The glass key stopcocks provide precise flow control but require occasional lubrication and careful cleaning before first use.

Reviews

  1. Hindi Lo 1/5

    Leaky stopcock

    Both burettes leak at the valve—drops fall even when the tap is shut. Not usable.

  2. ITZEL GOMEZ MARTINEZ 1/5

    Arrived damaged

    Came broken

  3. Bill Shoemaker 5/5

    Solid quality set

    Pleased with the set; they were packed securely.

  4. Ana V 5/5

    Good quality

    Good quality

  5. Stiv Canar Ortega 5/5

    Handy and economical

    Good cost-to-value ratio.

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