[s-cars] Rear Caliper Carrier Bolt

[Tony Curran]

Hi folks,
 
I plan on replacing rear caliper carriers this weekend. When searching ETKA
for bolt size I get:
 
10x1, 25x50.
 
I was expectation to see something like M10x25
 
Can someone explain what that means in Imperial or Metric?
 
Thanks
 
Tony