180mm x 260mm (7"x10")
Item: #406
Thickness: 0.4mm
Weight: 25 grams
Material: optical PVC
Groove pitch: 0.3mm
Focal length: 300mm
Magnification: 3x
Protective case: No

250mm x 250mm (10"x10")
Item: #A250S
Thickness: 2mm
Weight: 152 grams
Material: inflexible optical acrylic
Groove pitch: 0.5mm
Focal length: 210mm
Magnification: 4x