Sunnysky Metal Servo Arm 1.5" Sale! from 831 /per Qty. Add to Cart This is a metal servo arm by Sunnysky. Compatibility - OMPHOBBY Edge 540 74" and many more Specifications Length - 1.5" Spline Teeth - 25T Material - Alloy with steel bolts Qty available:40 SKU:BFWL0021