These Sturdy 16 Gauge Fittings are black painted and have 1/4 in. Allen set screws. They are made for use with 1-3/8 in. O.D. pipe. This pipe is available from fence companies and building supply outlets in 16, 15, 14, and 12 gauge sizes, usually in lengths of 10 and 21 feet. Each infielder protector net kit contains two 90 degree fittings, two 4-way fittings and instructions.