New compression fittings are for use with ¼ -28 threads and 4-mm OD tubing. The corrosion-resistant stainless-steel and brass fittings provide airtight connections. Also available are M3, M4,10-32,M5, ¼-20, and 5/16-24 thread sizes and 1/16, 1/8, and ¼-in.-OD tubing options.

Beswick Engineering Co. Inc., 284 Ocean Rd., Greenland, NH 03840, (603) 433-1188,