{ "language_tag": "en_US", "value": "360 degree head has three scales calibrated", "marketplace_id": "ATVPDKIKX0DER" }
وصف
Clear transparent plastic permits observation of joint's axis of motion, and its range of motion. The 360-degree head has three scales calibrated to be used with the ISOM (International Standards of Measurement, STFR) system. One arm has a linear scale in inches and centimeters. Scale reads 1-degree increments.