Strut End This is for 4 strut ends. It snaps onto a 13mm ball stud and screws onto the end of a 10MM x 1.25 thread on the end of a strut. Total height 1.150" (30mm). Good to replace ends on many new struts (which the standard is plastic 10mm ball sockets) if your application has 13 mm ball studs. These are chromed steel.