DANYANG HAOYUAN OPTICAL INSTRUMENT CO., LTD. could mainly supply two serial of trial lens set: plastic rim (SL), metal rim (JS). The type include 266, 232, 158, 104, 48pcs etc, all our trial lens sets feature our elaborate design that make the optometrists use them efficiently and accurately. Confirmation flipper, cross cylinder, retinoscopy bars and below trial frames are also in our supply range. Trial frame-A: full featured, lightweight and friendly controls with rotating cells. Trial frame-B: metal construction, easy-to-use controls. Trial frame-CF: with adjustable legs, PD from 52 to 68. Trial frame-C: comfortable fit, PD from 54 to 68. We passed ISO9001: 2000 and got the CE certificate. Our trial lens sets and trial frames meets ISO 9801:1997. We have exported our products to US, Europe, Japan for some years. Please let us know if we can be of any help to you.