All three types (sheet, stand and flexible) magnifiers can be found here.
Acrylic lens, plastic frame and body, with flexible arm and clip.
Model No. CO-1701
Magnification 4x
Lens diameter 30mm
Weight 14g
Measurement 0.043M3
Glass lens, with flexible arm and stand.
Model No. CO-3654
Magnification 2.25x
Lens diameter 75mm
Weight 1.84kg
Measurement 0.10M3
Model No. ...
Model No. CO-R102
Magnification 2x
Lens diameter 85x45mm
Weight 6g
Measurement 0.028M3
Model No. CO-1030
Magnification 4x
Lens diameter 47x100mm
Weight 6g...
193x140mm Fresnel lens, with handle and stand.
Model No. CO-1580
Magnification 1.8x
Lens Diameter 193x140mm
Measurement 0.09M3
215x260mm Fresnel lens, with stand:
Model No. CO-E327
Magnification 1.8x
Lens Diameter 215x260mm
Weight 1.9kg
Measurement 0.029M3
300x250mm High quality fresnel lens, with flexible arm and stand:
Model No. CO-E1984
Magnification 1.8x
Lens Diameter 300x250mm
Weight 1.4kg
Measurement 0.128M3