Pirastro Obligato Cello String SetWarm and sonorous tone quality, rich with overtones. Produces an impressive amount of volume, a very dynamic response and great playability. Excellent uniformity across all strings with pliable feel under the finger. Resistant to changes in temperature and humidity. Instrument: Cello String Type: Set Size: 4 4 Gauge: Medium A String: Chromesteel wound over a steel core D String: Chromesteel wound over a synthetic core G String: Tungsten wound over a