MRCOOL MPDK4260 3.5 to 5 Ton Downflow Kit for Signature Package UnitMRCOOL MPDK4260 MRCOOL Downflow Kit for Signature Series (MPDK4260). Intended for MR COOL air handler. 3. 5 to 5 Ton Downflow Kit for MrCool Signature Package Unit Signature Downflow Kit Series. Intended for MR COOL air handler. Proposition 65 Warning. Dimensions: 26 in (L) x 26 in (W) x 6 in (H). Additional Information ModelMPDK4260 UPC810512034772 Product Height (in)6 Product Length (in)26 Product Width (in)26 Weight (lbs)13