My praise of the Duo-Therm Old Hands lasted right up until the point at which I opened the box they sent me, to discover that the $5 piece of foam they charged $15 to send me was too small by a factor of about three. Maybe when they said I could cut it to fit, they meant I could cut down the air-conditioner, because that is the only way it would have worked. Is it completely impossible for someone at Duo-Therm to call the warehouse and ask someone to get the thing out and measure it before they send it out? Apparently so. Thankfully, about twenty years ago someone invented the internet so I went on that, found a roll of stickyback foam for eight dollars and it is even now lining the AC housing.