Long Reach Thickness Gage This thickness gage is designed to help you measure thickness applications when you have a lip or ledge that you need to get over, or you need a long reach to measure your parts. Specifications include... 0-4" / 100mm Measuring Range 0.0025" / .05mm Resolution 2" Max Contact Travel Each Arm 15" Arm Reach 1.37" Contact Length Upper 1.37" Contact Length Lower 2 Tip Styles available... .196" Diameter Ball Tip on both upper and lower arms 2" Diameter Flat Tip on both upper and lower arms Please select Tip Style when adding to cart.