This is a pair of DuBro Heavy Duty Clevises with 4-40 Ball Links.
For use with the DuBro #3355 & #3365 Heavy Duty Clevis Horn Systems or modeler's own set-up 4-40 heavy duty swivel ball links for no-slop precision control
Two Heavy Duty Clevises with
two 4-40 Ball Links
Two 2.5x8mm Screws