Glass Microfiber Filters/18.50cm

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Advanced Lab Filtration for Precise Research & Analysis

Lab Filtration Papers brings you lab-grade Micro Glass Fiber Filters that combine exceptional particle retention with reliable flow rates. Available in both standard and custom formats, our filters are designed to meet the exacting needs of modern laboratory workflows.

Why Choose Our Micro Glass Fiber Filters

Superior Particle Capture – Efficiently retain particles as small as 0.3μm while maintaining excellent flow rates for faster processing of your valuable samples.
Thermal and Chemical Stability – Withstand temperatures up to 500°C and perform consistently across a wide pH range, making them versatile for diverse laboratory applications.
Available Your Way – Choose from our comprehensive range of standard sizes or request custom-cut filters tailored to your specific equipment and protocols.
Trusted by Research Professionals – From academic institutions to pharmaceutical R&D, laboratories rely on our micro glass filters for reproducible, high-quality results.
Laboratory-Grade Quality, Competitive Price – Experience performance that matches or exceeds leading brands without the premium markup.

Standard and Custom Options

Standard Sizes – We stock common laboratory formats including:
- Circular discs in diameters from 24mm to 150mm
- Sheet filters in multiple dimensions
- Pre-folded and flat filter papers for various funnel types
Custom Solutions – Our precision cutting capabilities allow us to create:
- Specialized dimensions for proprietary equipment
- Unique shapes for custom filtration assemblies
- Exact specifications for particular research protocols

Laboratory Applications

Sample Preparation – Clean separation of particulates from solutions prior to analysis.
Gravimetric Analysis – Reliable particle collection with minimal interference.
Liquid Clarification – Effective removal of fine particulates from reagents and samples.
Environmental Testing – Precise collection of particulates for water and air quality analysis.
Biological Sample Processing – Gentle yet effective filtration for sensitive biological materials.

Quality You Can Count On

Every batch undergoes rigorous testing for thickness uniformity, wet strength, and consistent pore structure to ensure reproducible results in your laboratory procedures.

Ready to Order?

Browse Our Standard Catalog of micro glass fiber filters
Request Custom Specifications for your specialized equipment
Consult With Our Lab Specialists about the optimal grade for your specific application
Order Samples to evaluate performance in your protocols

Choose Lab Filtration Papers Micro Glass Fiber Filters for laboratory filtration you can trust—available in both standard sizes and custom configurations to support your most important research.

Grades	Retention in µm	Filtration Speed Herzberg sec/100mls	Filtration Speed Rapidity mls/min	Loading Capacity	GE Whatman Cross Reference
151*	0.7	274	25	Very High	GF/F
121*	1.0	143	48	Very High	GF/B
131*	1.0	88	78	Very High	GF/C
161*	1.1	67	102	Very High	934-AH
111*	1.2	53	130	Very High	GF/A
141*	3.1	19	350	Very High	GF/D
169*	1.0	53	130	Very High	934-AH

Products for Suspended Solids Analysis

Standard Method 2450 for measuring solids in water calls for a glass filter disc without organic binder for some steps. It is important for this gravimetric test that the filter itself not change weight so that the solids can be accurately measured.

Grade 169* - Volatile Suspended Solids
Grade 161* - Total Suspended Solids

Filter Papers for TCLP

Ahlstrom-Munksjö offers three microfiber glass grades for use in the toxicity characteristic leaching procedure (TCLP) as described in EPA Method 1311.

Grade 151* - Standard TCLP Filter
Grade 193* - Low Metal TCLP Filter
Grade 26* - Pre-washed Low Metal TCLP Filter

*View Ahlstrom Guide for more information