Inquiry (采购产品): SS T coupling 3/8x3/8x1/4 The 3/8x3/8 part of the T is to fit into a line carrying cooling water and electrical wire. The 1/4 inch opening is to hold a small Light Emitting Diode on one side and a photodiode on the other. The instrument is a anemometer for measuring wind speeds in fires. The design is difficult to describe in print. The previous design had a LED-phototransistor inside the body of the instrument but it was difficult to service. You are relatively close to Fallbrook on I15. **** Hidden Message ***** Tom Palmer 823 Ridge Drive Fa;;brook, CA 92028 USA Company: SWETL Title: owner Phone: 760-728-4567 Fax: 760-728-4965 (when it works) E-mail: typ@tfb.com **** Hidden Message ***** typ@tfb.com