... : Silver-grey 4,Surface finish: 80/60 Germanium Stone (99.9%) 1), Material : metal germanium 2), Specification: Φ3mm;Φ ... 8mm; Φ10mm;Φ12mm.3), Surface finish : 80/604), Purity : 99.999%5), Package : blister plate (100PCS/layer) 6), Specification: ... the main parameters, then we will design the drawing and customize this lens for you.7), Pictures 8), Output ... our website: www.shhxgd.com Ge. Stone(99.9%)