DESCRIPTION: 2 3/4" Easy to Read Direct Reading Dial; Easily Installed, Fits 3.75" (9.53 cm) Mounting Hole; Internal Green Night Illumination; Built-in Compensators to Easily Adjust for Deviation; Scientifically Matched Sapphire Jewel & Hardened Steel Pivot Dial Movement; Powerful DirectiveForce Magnets for Fast Heading Lock-on; Movable Sun Shield; High Temperature Composite Construction for Extended Operating Range. FEATURES: Card Graduations: 5.0 Degrees; Compensators: Integral; Back lighting: 12 Volt Dc; Body colour: Black; Card colour: Black; Card style: Conical; Card size: 70mm. DIMENSIONS: Height: 48mm; Width: 123mm; Panel Hole: 93mm; Depth below Panel: 58mm.