Tee 3/8 F COMP SWIVEL X 3/8 M COMP X 1/4 FPT

Tee, Connection Size 1: 3/8 in, Connection Type 1: Female Compression Swivel, Connection Size 2: 3/8 in, Connection Type 2: Male Compression, Connection Size 3: 1/4 in, Connection Type 3: FPT