The 1234T100 Series Turn and Slip Indicators are trusted, high-reliability instruments with a proven track record in OEM applications and HALT testing. These FAA TSO C3b certified units feature a 3-inch display, built-in power warning indicator, and are known for consistent performance in demanding flight environments.This 1234T100 Series Turn and Slip Indicator (EDMO# 1234T1003T) has a black ball with a white background and is lighted.