DTECH DB9 RS232 Serial Null Modem Cable Female to Female Full Handshaking 7 Wire Crossover for Data Communication 0.5M

Perfect cables. Bought on the off chance as someone had walked off with the original equipment cable which dell wanted £110 to replace. Plugged in worked perfectly so have now bought 3 so we have spares locked away

Good quality for the price and works perfectly well for my application.