SPL 14-03 is 14mm O.D tube x R 3/8 thread 316 stainless steel male elbow pneumatic fitting. Use it to connect 14mm O.D PU, PA, PE, teflon tubing to R 3/8 female thread by 90°. 316 SUS body with SUS collet & FKM( viton) seal makes it resistant to aggressive environment.