https://messwelt.com/en/products/three-point-internal-micrometer/digital-three-point-internal-micrometers-ip-65-din-863/
Digital three-point internal micrometers DIN 863 | Messwelt
Digital three-point internal micrometers | IP 65 | DIN 863 | range 6 - 100 mm | for blind hole | with carbide measuring faces
three pointinternal micrometersdigitaldin
https://www.precisium.eu/on-line-shop/special-gauges/micrometers/i_59317_digital-internal-micrometers-3-point-xtd-in-box-without-setting-ring-including-ukas-calibration-certificate-65-80-0-001-80mm-bluetooth
Digital internal micrometers, 3-point XTD in box without setting ring, including UKAS calibration...
DIN 863 Protection class IP67, Sylvac System Tungsten carbide-tipped measuring faces ( 12.5mm with steel measuring face