Check the listing for details. Cmm Probe Stylus for CMM Machine Tools Ceramic Stem M4 Thread Shank 6mm Diame.... Color: M4*D6*L50, Condition: New. Listed at 69.76 USD. Cmm Probe Stylus for CMM Machine Tools Ceramic Stem M4 Thread Shank 6mm Diameter Ruby Ball Tips 50mm Long A-5000-3709 (M4*D6*L50) ✓ Free 60 Day Returns ✓ Free Express Shipping Description: Prouduct Detail: Size:M4D6L50 Thread shank M4 stylus Ø6mm(0.2362") ruby ball, ceramic step, Length 50 mm(1.9685") Compare to Renishaw A-5000-3709. Package:1x Touch Probe Features: Ruby provides a long life without wearing of the surface from abrasive materials.For ball diameters greater than 3 mm, and lengths over 30 mm,ceramic stems offer stiffness comparable to steel but are significantly lighter than tungsten carbide.Ceramic stemmed styli can also offer additional crash protection to your probe as the stem will shatter in a collision.Straight styli are designed to inspect simple features where direct, unobstructed contact with a measured surface is possible.Thread shank M4 stylus 6mm(0.2362") ruby ball, ceramic step, Length 50 mm(1.9685") Product Details: Is Discontinued By Manufacturer ‏ : ‎ NoPackage Dimensions ‏ : ‎ 2.2 x 0.7 x 0.2 inches; 0.01 OuncesItem model number ‏ : ‎ Ceramic-M4D6L50 A-5000-3709Date First Available ‏ : ‎ July 26, 2018Manufacturer ‏ : ‎ SUXINGBest Sellers Rank: #41,429 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #152 in Test Probes & Leads#152 in Test Probes & LeadsCustomer Reviews: 4.8 4.8 out of 5 stars 67 ratings