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Test Tube Borosilicate 3.3 Glass - Without Rim

Test Tube Borosilicate 3.3 Glass - Without Rim

SKU
R 3.50 - R 8.50
R 3.50
R 3.50 - R 8.50
R 3.50
Availability:
619 in stock, ready to be shipped
Availability:
1089 in stock, ready to be shipped
Availability:
923 in stock, ready to be shipped

Test Tube Borosilicate 3.3 Glass (Flat Mouth/Without Rim) are premium laboratory tubes designed for high-stress applications involving extreme temperatures and corrosive chemicals. The "flat mouth" or "rimless" design features a smooth, straight-cut top edge, which is preferred for automated systems, clean pouring, and compact storage.

Key Features
  • Material: Borosilicate 3.3 Glass (ISO 3585), known for its ultra-low coefficient of thermal expansion.
  • Thermal Resistance: Can withstand high temperatures (up to 500°C) and extreme thermal shock (moving from heat to cold rapidly).
  • Chemical Stability: Superior resistance to water, neutral and acidic solutions, and strong oxidizers.
  • Design: Features a round bottom and a flat, rimless mouth for easy plugging with rubber or silicone stoppers. 
 
Standard Sizes & Capacities
Commonly used dimensions for Borosilicate 3.3 tubes:
 
Dimensions (Dia. x Length)  Capacity (Approx.) Common Application
12 x 75 mm 5 mL Small-scale reactions / Centrifuging
15 x 100 mm 12 mL General chemistry / Clinical use
18 x 150 mm 27 mL Standard lab experiments
20 x 150 mm 35 mL Microbiology / Media preparation
25 x 150 mm 55 mL Large volume boiling / Storage
 
 
Key Advantages
  • Flame Safety: Unlike soda-lime glass, these can be heated directly over a Bunsen burner or open flame without cracking.
  • Autoclavable: Fully resistant to repeated steam sterilization cycles at 121°C.
  • Clarity: Offers high optical transparency for accurate visual monitoring of reactions and color changes.
  • Versatility: The rimless top allows for a tighter fit in certain test tube racks and automated capping machines.

Rubber Stopper

  • 125 x 16mm test tube can be used with RS7 rubber stopper. RS7 is available as one hole, two hole or Solid.
  • 150 x 16mm test tube can be used with RS7 rubber stopper. RS7 is available as one hole, two hole or Solid.
  • 150 x 24mm test tube can be used with RS13 rubber stopper. RS13 is available as one hole, two hole or Solid.

Specifications:

  • Material: Borosilicate 3.3 Glass
  • Design: Round bottom and a smooth, rimless edge (no beaded rim)
  • Brand: NONE
  • Product of China