This is an Heavy Duty EZ Connector set by Dubro. EZ Connectors link a pushrod to a servo arm allowing it to pivot for less bind in control surfaces. FEATURES: Works on 2-56 and smaller wire (.078") Permanent or snap on mounting push nuts both included. INCLUDES: Two aluminum EZ Connectors Two plastic snap nuts. Two metal snap nuts. Two 2.5x3.5mm hex head screws. REQUIRES: Assembly onto linkages SPECS: Length of aluminum: 5.6mm (.223") Diameter of aluminum connector: 5.5mm (.217") pjm 4/10/02 ir/kh