Black PVC Plastic PC Cooling Fan or CPU Duct for 120mm Fan or Port Tube for your custom made sub woofer or speaker cabinet. A speaker port tube can contribute to lowering frequency output of your custom speaker system.
4-1/8" (99mm) Inner diameter x 4.5" (115mm) length.
Flange end measures 4-7/8" (122mm)
Cut a hole straight through your front bezel to 60mm size fan. Measure space between fan and bezel opening. Use saw to cut tube down to proper length to create direct air cooling. Also use as side air duct to CPU. Can be used as a port tube for your custom speaker or sub woofer cabinet box builds.