The ends are straight and spring-loaded self-adjusting to 17.2mm 18mm 19mm 20mm 21mm and 22mm.
Spring bars are included, remember to tell us what size you need.
The length at the spring bars is 6 1/8" (155mm).
We can shorten it for no extra charge and might have links to add, send a message with length you need before purchase and we'll see if it can be done.
