Linen Testers, originally used for counting threads in textiles, are now the most popular general purpose magnifiers used by graphic arts professionals, also popular in print shops worldwide.

- Brand: Balloon®
- Model: FDL90G
- Magnification: 2.5x
- Len diameter: 90mm
- scale: square, millimeter and inch
- dimension 60 x 60 mm
- Colour: Black
- Material: Plastic frame & glass len
- Build in E10 4,8V light bulb
- Battery:  1.5V AA battery (not included in the magnifying glass)
- Made in China
- Glass lens mounted in a plastic frame assures a uniform flat field that is always in sharp focus