Description Pro-Link Ripmax Xcalibur PLUS Main Struts The Pro-Link Xcalibur main struts for the “PLUS” Model have been developed from the ground up specifically for the Xcalibur “PLUS” 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-4004).  If upgrading from stock Retracts, uses Hercules Series Retracts.  For nose strut see #PL-200. Includes: Pro-Link Xcalibur Plus Trailing Link Main Struts Pro-Link 1/4″ Axles Nylon Axle Washers Specs: Length: 6.25″ / 158.75mm (including the .75″ step that enters Trunion) Wheel Sizing: 3.5″ / 89mm (MAX) Attachment: 1/2″ Trunion Lock Offset: .750″ Axle: 1/4″ Brake Flange: .50″ Material: T-6 Aluminum Weight: 8.4oz (pair) Dont be fooled by imitations! When only the best will do, Go Pro-Link!