Robnik - Sapphire fluo (4000 meter) - elastic mounting

Here are some key-features of the Sapphire-professional:

• The exterior and interior housings are made from anodized AW6060 aluminium.
• All axles, pinions, springs, scews, washers and needles are made from stainless steel.
• Jewel bearings with axial-backlash compensation.
• Hardened beryllium-copper used for aneroid-capsule and membrane-spring.
• High quality, high strength, precision-machined mechanical components.