(Photo shows center insert arrow of the date insert.)
[Specification/material]
Outer diameter: φ3, φ4, φ5, φ6, φ8, φ10, φ16, φ20
Total length: OP type= 8mm, 10mm, 12mm, 14mm, 16mm
Display mark: year-month, year, month, date and others up to customer request
Material: SUS420