WHO Periodontal Probe, Ball Tip, markings at 3.5, 5.5, 8.5, 11 ...
Michigan OW Round Dental Periodontal Probe with Williams markings at 1, ...
Single End Flat Goldman-Fox Periodontal Probe, markings at 1, 2, 3, 5, 7 ...
Periodontal Probe #12, markings at 3, 6, 9, 12 mm