PDC Spas Topside 4 Button Non-digital Air Control (1996-2001 Prima, 100 Series) Part Name: Non-digital Air Control Part Number: CTLP-CC4-P Manufacturer: Tecmark Tubs Used On: Prima, 100 Series Used From: 1996 Used Until: 2001 Description: Non-digital 4 button air control with 10 ft. cord.