Descriptions: This 90 degree elbow adapter is made of high quality brass material, durable to use. Chrome plating of the surface treatment, bright and delicate. International standard G1/4 thread adapter, is the great joint collocation of computer water cooling system. Features: Made of high quality brass material, durable to use. Chrome plating of the surface treatment, bright and delicate. It is the great joint collocation of computer water cooling system. International standard G1/4 thread adapter. With silicone sealing ring , good sealing. Two adapters are optional, the out diameter of 9 mm is for inner diameter 7-8mm hose,the outer diameter of 11mm is for the inner diameter of 9.5-10mm hose. Specifications: Thread specification: G1/4, actual outer diameter is 12.9mm. Material: brass Surface treatment: chromium plating Seal: with silicone seal ring Outer diameter (optional ): 9mm/0.35inch , 11mm/0.43inch The outer diameter of 9mm is for inner diameter of 7-8mm hose. The outer diameter of 11mm for inner diameter of 9.5-10MM hose Weight: 23g, 24g Package Included: 2 x 90 Degree Elbow Adapter Note: Due to surface plating process, it will exist color difference, if you mind, please not order!