Electronic Indicator - Starrett Electronic Indicator, 3900A / 3900MA Style:Metric these discs are offered in

these discs are offered in a range of sizes and a variety of attachment styles

4 front pockets

Trigger speed control in two ranges: 0-335/0 to 750 RPM

Item #: H6F/V

Lamping: 2 x 15W A19 LED bulbs (not included)

Electronic Indicator - Starrett Electronic Indicator, 3900A / 3900MA Style:Metric these discs are offered inItem #: 3900A 5 3900A 1 3900MA 5 3900MA 25 The 3900A Series Electronic Indicators have simple, powerful, easy to use functions, all at an attractive price. Converts inches metric with the press of a button. Ships with flat back installed, and includes a lug on center back as an accessory. Available in inch metric (3 8 stem, 4 48 screw thread) and metric inch (8mm stem, M2. 5 x 0. 45 screw thread) The 3900A 5 features 1 2" (12. 7mm) Range, . 0005" (0.