March Scopes Large Dial Lower Profile Black. These blank BDCs replace the existing elevation knob on your March scope and let you create your own elevation adjustments to suit your load. Make any changes to your load and replace the tape on the dial quickly and easily. The blank dials can also be used for air rifle field events in conjunction with the Large Wheel for added accuracy at short ranges. Specifications for March Scopes Large Adjustment Wheels: Manufacturer: March Scopes Color: Black Finish: Type 3 Hard Coat Anodizing Fabric/Material: 7075 Aluminum Fit: Universal Gun Type: Rifle Gun Make: Universal Gun Model: Universal Country of Origin: Japan Package Contents: March Scopes Large Adjustment Wheels March Scopes DB392-0: Large Dial Lower Profile Black