Standard size spring bars with 0.8mm tips that are 1.8mm thick in the center. These will fit almost all watches with standard lugs in the width listed.
Includes 2 spring bars.
If you need spring bars with 1.1mm tips for your Seiko, you can find them here.
These also work great with the following StrapHabit straps:
-Elastic
-Seatbelt
-Adjustable
-Beads of Rice Bracelets
-Standard H x StrapHabit Pass-Through