Economy Universal Trial Frame

Made of light-weight metal & plastic.  
Holds 5 trial lenses.
Holds standard 1.5″ (38 mm) trial lenses.
Independent right and left adjustment of PD 1.9″ to 3.15″ (48-80 mm).
Bridge height and inclination operate by a rack and pinion.
Sides adjustable for length and angle.
Compatible with Fresnel Prism Trial Lens sets.
Low-set hinges allow easy insertion of lenses into the rear lens cells.
With Vertex distance scale.