H-K9L is a commonly used high quality optical material. Because of its homogeneity, low air bubbles, good physical and chemical performance, it is usually processed to high precision optical element which is used in visible and near infrared region. Such as lens, prism, plane mirror etc. For H-K9L, H means environmental glass which conforms to European ROSH standard without Lead, Arsenic, Cadmium and radioactive element. K means crown glass.
Environmental Optical Glass: H-K9L
Waterproof and Nano Coating: Super High Light Transmittance Reaches 99.3%
Sturdy and Durable Copper Frame
Milling Craft and Original Creation Royal Classic Coloring Technology