3/8" Diameter

3/8&quot; X 11/2&quot; BLACK IRON NIPPLE

3/8 X 2 BLACK IRON NIPPLE

3/8&quot; X 21/2&quot; BLACK IRON NIPPLE

3/8&quot; X 3&quot; BLACK IRON NIPPLE

3/8&quot; X 31/2&quot; BLACK IRON NIPPLE

3/8&quot; X 4&quot; BLACK IRON NIPPLE

3/8&quot; X 41/2&quot; BLACK IRON NIPPLE

3/8&quot; X 5&quot; BLACK IRON NIPPLE

3/8&quot; X 51/2&quot; BLACK IRON NIPPLE

3/8&quot; X 6&quot; BLACK IRON NIPPLE