Hamilton’s ¼”-28 tubing assembly features 2 precision machined, 1/4"-28 IS/IS PCTFE fitting(s) with strain relief spring(s) across high quality (0.123" O.D / 0.063" I.D), Heavy Wall PTFE tubing. Customizable tube length between 1 and 72 inches. Compatible with any flat-bottom ¼”-28 port. Hamilton’s Heavy Wall PTFE tubing and PCTFE fittings are chemically resistant, temperature resistant, and durable for a leak-free connection each time. Choose from a standard stock option or define a custom tubing length.