Rath sanitary process tubing meets ASTM A270 and 3A finish specifications. It is manufactured from the finest quality stainless steel materials made exclusively to Rath melt criteria. The tubing is formed with an exclusive Micro-Weld process on tube mills; developed and built by Rath to assure weld seam integrity and consistent finish. Select tubing in sizes from 1" to 4" O.D. in stock 20 ft. lengths. Custom lengths are also available.