Dial Indicators, Micrometers, Calipers manufacturer / supplier in China, offering 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, Factory Direct Supplier 20-25mm/0.8-1", IP54 Digital Inside Micrometer with Self-Centering Design & Bluetooth and so on.