/ Precision Measuring Tools / Precision Hand Tools / Bore Gages / Bore Gage Accessories / 78/782H * Not actual product image 65486 78/782H Extensions for 781XT AccuBore Electronic Bore Gage 65486 Other similar products The Starrett Internal Extensions for 78 Series Internal Micrometers includes 1/2-3/4" (12.5-20mm) sizes, 4" extension size, and fits modeles 78XT/780XT/781XT625-750. Extension 4"/100mm Long for use with 78/780/782, 500-750. Features Specifications Downloads Contact Starrett Features Extensions can be added to both the 780XT and 78XT Series, enabling internal measurements in deep hole bores. (Multiple extensions can also be used.) 4" Length Specifications Fits Starrett Series: 78XT/780XT/781XT/782XT–625-750 Downloads Starrett Electronic Precision Hand Tools (Bulletin 590) Starrett’s expanded range of electronic precision tools includes more than 100 new micrometers featuring advanced electronics, larger displays, enhanced ergonomics, longer battery life, IP67 rating and more. The product range includes Micrometers, Calipers, Height Gages, Depth Gages, Indicators, Bore Gages and Testers.