Plymouth Tube Co. has been a leader in the manufacturing of Aerospace Steel Tubing since the Spirit of St. Louis Era and has been consistently evolving with changes in technology. In order to meet and exceed customer expectations, Plymouth consistently makes improvements and will continue to be a leader in the industry with superior quality, technical expertise, customer assistance as well as a extensive product offering. Specifying PTCA Steel Tubing ensures the quality and technical support the industry has come to expect from Plymouth Tube Company. Welded and Drawn Stainless Grades include: 21-6-9, 17-7PH, Custom 455, 625, AL6XN, 304/L, and 321. Seamless Stainless Grades include: 304/L, 316, 321 and 347 and Seamless ProMoly™ (4130) Alloy round and shaped tubing.  The only way to fly with integrity is to specify PTCA.