By DELTA
Swiss Quality Hytrel I-Ring ,Height 1.75mm, Thickness 0.40mm In 49 Sizes From External Diameter 16.8, 17.3, 17.8 To … 39.8, 40.3, 40.8mm By Step 0.5mm (Internal Diameter 16.0 To 40.0) Total 49X2=98pcs For 2.0mm Glass Or Thicker
Refill Code : WR-6008G20-168 / External Diameter