This is a perfect yarn for colorwork. It is hard wearing, good colors, does not pill and it's been around forever.
Details:
191 yards(175 meters)
Unit weight
50 grams (1.76 ounces)
Gauge
24.0 to 26.0 sts = 4 inches
Needle size
US 1½ - 4 or 2.5 - 3.5mm
Fibers
100% Wool