Swagelok SS-1210-R-6 gaugeable 316 stainless steel tube fitting — reducer, 3/4 in. tube OD x 3/8 in. Swagelok tube adapter. Body in 316 stainless steel with a Swagelok two-ferrule (front-ferrule/back-ferrule) mechanical-grip tube end on the larger side and a reduced-size Swagelok tube-adapter end, joining two different tube sizes in a single gaugeable, leak-tight fitting. End connections: 3/4 in. Swagelok tube fitting x 3/8 in. Swagelok tube adapter. Bored through: Yes. Supplied with Standard Cleaning and Packaging (SC-10). Working pressure and temperature ratings are set by the selected tubing per Swagelok catalog MS-01-140; use with correspondingly sized, fully annealed 316/316L stainless steel tubing.