Description Pro-Link Ripmax Xcalibur Main Struts The Pro-Link Xcalibur main struts have been developed from the ground up specifically for the Xcalibur airframe with weight, reliability and durability in mind. Our light weight, machined T-6 aluminum struts are designed to accept Intairco Wheels and Brakes (IAC-3004).  If upgrading from stock Retracts, uses Gemini Series Retracts for a “Drop-In” Fit! Includes:     Pro-Link Xcalibur Trailing Link Main Struts Pro-Link 1/4″ Axles Nylon Axle Washers Specs:     Length: 4.75″ / 120.65mm Wheel Sizing: 3″ / 76mm (MAX) Attachment: 1/2″ Trunion Lock Offset: .750″ Axle: 1/4″ Brake Flange: .50″ Material: T-6 Aluminum Weight: 5.6oz (pair) Dont be fooled by imitations! When only the best will do, Go Pro-Link!