The Bykski DDC Style Pump w/ 5v A-RGB LED is a DDC pump with the Bykski heatsink armor preinstalled. The PMMA top is pre-threaded for CP-PA-X-F6O series reservoir tubes but they are NOT required for use. A strong DDC pump powers the unit that features 300 L/H. You can see from the secondary pictures the pump can be mounted in a variety of ways using optional Bykski brackets.