Trial Frame, Model No.RTF-10 The Adjustable Trial Frame is a Light Weight Trial Frame with Aluminium & stainless steel sides The cells are spaced to accommodate reduced aperture lenses only Accommodate up to 8 pieces 38mm trial lenses and it permits smooth & easy manipulation of Bridge & P.D. Fully adjustable temple length and nose rest. Easily changeable cylinder axis Wide range of PD adjustments from 48mm – 80mm