/ 2900-4ME-50 We are sorry but the item (2900-4ME-50) you are looking for is no longer available Please reach out to us at custsupport@starrett.com or call at 978-249-3551 for assistance. There is a newer version of this product available 2900-6ME-50 Electronic Indicator Starrett 2900 Electronic Indicators have Innovative True Absolute Sensor Technology to minimize the chance of data loss for exceptional reliability.