This is a matte black adapter that converts 1/4 inch external threads to 1/4 inch internal threads, serving as an extension. The connection has a 45-degree angle and is double-rotatable for added flexibility.

Note: The rotating function of the connections should always be used when disassembled, as it is relatively stiff due to its design. When assembled, no force should be applied to the connections to avoid damaging the connections themselves and the coolers attached to them.