Deep Throat, High Resolution Digital Thickness Gage with Roller Contacts Deep Throat Thickness Gages are precision measuring tools used to measure the thickness of materials in hard-to-reach or confined areas. They are designed with an extended reach or "throat" that allows them to measure the thickness of materials in areas where traditional thickness gages cannot reach. This Deep Throat Thickness Gage includes special J50R Roller Contacts designed to measure the thickness of thin, moving material. The gage includes a 0-0.2" measuring range with a 0-16" deep reach, allowing you to measure thickness in hard to reach places. The attached lifting lever makes for one-handed operation. Includes Mitutoyo Digital Indicator with SPC Output Capabilities. Features include... 0-0.2" / 5.08mm Measuring Range 0.00005" / 0.001mm Resolution WITH SPC Output J50R Roller Contacts specifications... 0.331" / 8.4mm Diameter 0.343" / 8.7mm Wide This gage takes approximately 1 week for production before shipping.