Deep Throat Dial Thickness Gage with Roller Contacts 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. Features include... 0-0.2" Measuring Range 0.0005" Graduations J50R Roller Contacts specifications... 0.331" / 8.4mm Diameter 0.343" / 8.7mm Wide This gage takes approximately 1 week for production before shipping. Not available until February 2022.