Model Number: MT-809, Gauge Measuring Caliper, Measuring Gauge Wide throat surfacing caliper. Nylon ball tips will not scratch lenses. Accommodates lens blanks of over 9cm diameter and 2.2cm in thickness. Overall length is 25cm.
Model Number: MT-807, IWANSON Gauge Spring Measurin Caliper, IWANSON Spring 10th gauge measuring calliper Made from Surgical grade steel, can also be used for dental purposes. Excellent Quality made of quality hardened Stainless steel.
Model Number: MT-808, Jewellers-Spring Measuring Caliper Gauge Gem-Stone 0-1-mm-to-15mm , Jewellers Spring Measuring Caliper 7", Measuring capacity 0.1mm to 15 mm, Suitable for measuring Gems, stones, Gold or silver sheets etc.