Glass tubes 21 cm with brush, ZWIESEL SH-8980-210

Glass tubes 21 cm with brush by ZWIESEL are slender, straight glass tubes 21 cm in length supplied with a dedicated cleaning brush sized for internal cleaning. Designed for careful handling, storage and transport of small liquid samples or decorative elements, this set is suitable for laboratory, household and display uses where narrow, clear tubing is required.

Advantages

The set includes one 21 cm glass tube and a matching brush, enabling convenient immediate use and maintenance. The clear, uniform glass construction provides good visibility of contents and resists common household chemicals used for rinsing. The included brush is shaped to reach the tube interior for effective cleaning without scratching the glass surface.

Suitable for

• Precision rinsing and sample handling in educational or hobbyist labs
• Transport and storage of small liquid volumes or narrow decorative elements
• Display and presentation in retail or craft setups
• Household tasks that require slender glass tubing for pouring or measuring

Key specifications

• Tube length: 21 cm
• Material: clear glass
• Includes: one internal cleaning brush sized for the tube
• Shape: straight, narrow cylindrical tube
• Typical uses: sample handling, display, rinsing, storage

How to use

Handle the glass tube by its ends and avoid applying lateral force to prevent breakage. To fill, hold the tube vertically or use a pipette or funnel for controlled transfer of liquids. After use, rinse the tube with appropriate solvents or water, then insert the supplied brush and clean with gentle back-and-forth motions to remove residues. Allow the tube to air dry in an upright position on a soft, stable surface or in a drying rack designed for narrow glassware.

Usage recommendations

Wear appropriate hand protection when handling chemicals, and store the glass tube in a padded container or rack to prevent impact damage. Do not expose the tube to sudden temperature changes. Clean with mild detergents or laboratory-grade solvents compatible with glass; avoid abrasive cleaners that may scratch the surface.