Use this to convert 12/16mm connection to 16/22mm connection.
Material : Stainless Steel
Connection : 12/16mm to 16/22mm
Dimension : 48mm Length
1) Hailea HS-66a(16/22mm) in and out connect to Eheim2213(12/16mm) in and out- you will need two of this.
2) Eheim 2213(12/16mm) connect to VIV Lily Outflow(16/22mm) – you will need one of this.