500 Class Bearing 4x9x4 Sale! from 580 /per 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. These are a perfect replacement or your 500 class helicopter The bearing measurements are 4mm x 9mm x 4mm Qty available:2 SKU:GT500-066