Supply BK7 Bi-concave lensBK7 Bi-concave lens EFL:-10mm-- -1000mm Dia:6.00mm??75.00mm Material: BK7(China K9) S/D:40/20 Centration:<3arcmin Customer design
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Supply BK7 Bi-concave lensBK7 Bi-concave lens EFL:-10mm-- -1000mm Dia:6.00mm??75.00mm Material: BK7(China K9) S/D:40/20 Centration:<3arcmin Customer design