Marion Aircraft 3-1/8" Stainless Steel Instrument Mount Clamp P/N 9900C from $37.75 Qty. Add to Cart This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. Condition: UsedCondition Description: as removed Manufacturer Part Number: 9900C Qty available: 1 Tweet