Barbed Tee Adapter. 1/2 in to 3/8 in to 1/2 in
Barbed Tee Adapter. 1/2 in to 3/8 in to 1/2 in at HorticultureSource.com -
1/2-inch X 1/2-inch X 3/8-inch BARBED POLY-HOSE TEE.