Port A Cool Extras Extras Accessories for Your Port-A-Cool® unit Cart for 16″ Unit Stock # PAC-ACC-30 (Unit not included). Increases ease of mobility for a 16″ Port-A-Cool® unit. Vinyl Cover Cover for 16″ unit Stock #PAC-CVR-02 Cover for 36″ unit & 24″ unit Stock #PAC-CVR-01 Cover for 48″ unit Stock #PAC-CVR-03 MK-47 Mineral Knockout Mineral treatmentStock #MK-47-CS MK-47 helps keep minerals in solution by changing the ionic structure of the mineralparticles. Therefore, minerals will less likely detach from the solution (water source) and form a buildup. 6 bottles per box. Caster Kit Caster Kit for 36″ and 24″ unit (4 per carton) Stock # CASTER-KIT-02 Comes standard with 48″ unit Adapter for Ducting (16″ unit only) Stock # PAC-ADP-16 For ducting airflow of the 16″ Port-A-Cool® unit into targeted areas for more effective spot cooling. (Ducting not included) Port -A-Filler Stock # PAC-ACC-01 50 gallon water tank. Totally portable water supply for 48″, 36″ and 24″ Port-A-Cool® units.