RitchieSport CompassRitchieSport Compass Features2 (5.08cm) Direct Reading DialEasily Installed, Fits Standard 2-1/16 (5.50 cm) Instrument HoleView Adusts up to 30 degreesScientifically Matched Sapphire Jewel & Hardened Steel Pivot Dial MovementExclusive Built-in Green NiteVu LightingHigh Temperature Composite Construction for Extended Operating RangeDirectiveForce MagnetsExclusive 5-Year Ritchie WarrantyApprox. Shipping Weight: 5oz (142g)Notes:X-21 Compasses do not have Built-in Compensators.Comes standard with 12V lighting. Some custom built OEM models may have different lighting. Contact Ritchie for replacement lighting.