I put new covers on a lot of my baseboard heaters and found out that it was cheaper to buy complete baseboard units instead of just the covers. What I have available for sale now is just the core units that the hot water flows through, the copper tubing, fins, etc. I presume that these are all a standard size - the cross section of what I have measures a little over 2" square. I have 3 ten foot sections, 3 eight foot sections, 1 seven foot section, and 2 two foot sections. Other than a few bent fins they're all like new. alaska