trial frame 1.grey colour with different PD ranges. 5pcs/case 2.convenient, precise measurement 3. ... frame* Feature1, grey color, the frame temple is adjustable2, PD adjustable range:(10specifications) 52,54,56,58,60,62,64,66 ... ,68,70;3, alloy material;4. trial frame set, 5pcs each case5. net weight 0.1kg/pc 6. dimension ...