Aquaclipse uses 4 each of the 1/4 gr. per Hour CD Cells. This cart is for 1 Each CD Cell. Our power supply is physically (.125, (1/8) inches) wider. Discontinued by Dell. When these are all gone we will offer a redesigned unit. The power supply is turned 90 degrees and two self start drill screw easily penetrate the aluminum mounting plate. We have experienced technicians available that can provide technical expertise for all aspects of your Aquaclipse system application and troubleshooting needs. For help give Steve a call: 805-238-72-72 He's an expert!