MC-2.5 2.5" inch glass lens 3.5x handheld held value priced inspection magnifier. A classic style magnifying glass style with glass lens, glass lenses are typically optically inferior to optical grade acrylic but offers a great value, is scratch resistant , and resistant to use around acids. This is a basic low priced magnifier, not recommended for professional use. This style magnifying glass is available in 5 different sizes and magnifications..