Dial Indicators, Micrometers, Calipers manufacturer / supplier in China, offering Professional Supplier 25-30mm IP54 Digital Three Point Internal Micrometer with Bluetooth Data Output, Inch/mm Conversion & Ratchet Stop for Industrial Use, 6-8mm, 8-10mm, 10-12mm IP54 Digital Three Point Internal Micrometer Set with Bluetooth Wireless Data Output Available, 20-25mm/0.8-1" Electronic Bore Micrometer with Bluetooth Data Output for Hole Measurement and so on.