Review on 🔌 High-Performance RS232 Serial Cable - 9 Pin DB9 Female to Female / Male to Male Gender Changer Coupler Adapter Connector Pack of 4 by Chris Peck

Don't buy! Female to female adapters literally fall apart. The only thing holding the adapter together are the connecting nuts. Often the plug to which this adapter is to be connected also has nuts. When you unscrew the nut from this adapter - common practice - the entire adapter falls apart - 14 small parts, not counting the nuts. All the manufacturer had to do was tape or crimp the two sides together, but they didn't.