20mm 28mm 30mm 42mm 44mm 45mm 50mm 58mm K9 Optical Glass Double Convex Biconvex Lens Magnifier Focal Length 40 50 150 200 MM

20mm 28mm 30mm 42mm 44mm 45mm 50mm 58mm K9 Optical Glass Double Convex Biconvex Lens Magnifier Focal Length 40 50 150 200 MM

Aliexpress UK