This OEM Delonghi Air Conditioner Extension is expandable for the window spacer. This expands from 19 3/4 inches to 39 inches. This extension is specifically for the window spacer that is for the following devices: PACAN125HPEKC3A, PACAN140HPE, PACAN140HPEC, NF90A, PAC130HPE, PACC120E Dont see your model number? Send us a message as we are happy to help! Installation instructions are NOT included with this filter!