trial frame 1.grey colour with different PD ranges. 5pcs/case 2.convenient, precise measurement 3.high quality but low price trial lens set / trial lens frame1, Fixed trial frame with grey colour;2, PD adjustable range:(10specifications) 52,54,56,58,60,62,64,66,68,70;3, alloy material;Parameter:Weight0.1kgVolume27(L) x 18.5(w) x 5(H)cm (5pcs/box)