**Basic Specifications of 4XC Metallographic Microscope**
3. **Objective Lenses:**
- Flat-field achromatic objective lenses (10X, 20X, 40X, 100X) with varying numerical apertures and working distances.
This microscope is ideal for detailed microscopic analysis in both educational and industrial settings. It supports various applications, including material science research, quality control, and advanced metallurgical studies. The combination of high magnification, precise optics, and user-friendly design makes it a reliable choice for laboratories focused on precision and accuracy.
- Model No.: Weiyi
- Type: Metallographic
- Mobility: Desktop
- Light Source Type: Ordinary Light
- Usage: Research and Analysis
- Optical Principle: Polarizing Microscope
- Application: Metallography
- Lab Equipment: Yes
- Packaging: Wooden Case
- Origin: Shandong, China
- Magnification: <50X
- Eyepiece Type: Binocular
- Stereoscopic Effect: Available
- Design: Rectangular Prism
- System Type: Electronic
- Configuration: Group Unit
- Hardness Testing: Block Type
- Brand: WEIYI
- Dimensions: 350 x 305 x 205 mm
- HS Code: 9024100000
Category | Magnification | Focal Length (mm) | Field of View (mm) | Remark |
Flat-field Eyepiece | 10X | 25 | 18 | |
12.5X | 15.6 | 11 | Purchase Required | |
Reticle Eyepiece | 10X (Lattice: 0.1mm) | 25 | 17 | Purchase Required |
Category | Magnification | Numerical Aperture (mm) | Working Distance |
Flat-field Achromatic Objective Lens | 10X | 0.25 | 8.9 mm |
20X | 0.4 | 0.76 mm | |
40X | 0.65 | 0.69 mm | |
100X | 1.25 | 0.44 mm |

Dry Saliva Collection Kits
Features:
• USP VI Polypropylene Tubes.
• Collection process is painless and safe.
• The humanized design of funnel conforms to the mouth shape of human, making the collection process simple and easy.
• Good sealing, effectively preventing leakage and contamination of specimens, easy to preserve and transport, safe and reliable.
• The bottom of the collecting vial is conical, which is convenient for concentrated sample processing.
• Bar codes are easy to manage digitally, and labels with writing areas are convenient for users to record information.
• RNase/DNase free, non-pyrogenic.

Saliva Collection Kit
Features:
• Use at normal room temperature;
• The 5 mL preservation solution vial is filled with 2 mL ITM solution;
• Samples can be stored and transported at room temperature;
• DNA samples can be stored stably for 12 months;
• RNA samples can be stored steadily for 1 month.
• This preservation solution has good antibacterial performance and high storage efficiency and can ensure the integrity of viral nucleic acids in the sample when it is used to store inactivated viral samples.
Introduction:
• The product is used to collect high-quality DNA/RNA samples in the saliva.
• The collection process is painless and won`t cause any injury or discomfort to the human body.
• The collected samples can be used for various biological experiments such as enzymatic hydrolysis, PCR and next-generation sequencing and are widely used in the collection and preservation of specimens in hospitals, scientific research institutions and households.

Collection Kits,Saliva Collection Kit,Painless And Safe Collection,Wedged In Funnels
Wuxi NEST Biotechnology Co.,Ltd , https://www.nest-biotech.com