Offered here is a brand new 150uf 450volt capacitor. It measures 6" long by 1 3/8" in diameter. One of the primary uses for this style capacitor is in electron tube apparatus. These are new production capacitors and have a much higher temperature rating then the smaller capacitors of the same value. These are designed to take the extra heat produced in RF Linear amplifiers and are rated at 85 Celsius.
I have a limited supply and wanted to offer them up to those radio folks that want to replace the old capacitors in their tube amplifier. Most RF tube Linear amplifiers have between 2 to 8 high voltage capacitors in a series parallel configuration most often. Meaning the actual capacitance is the total sum of all capacitors in that series parallel circuit. If you have (4) 200uf capacitors your total value in the circuit is 800uf. You could use 5 or 6 of these capacitors to replace the 200uf capacitors that have an overall capacitance total of 800uf satisfying the circuit requirement. If you used 5 you would have a minimum of 750uf and if you used 6 you would have 900uf in that circuit. Capacitance in this circuit does not need to be spot on and has at least a 20% tolerance factor. As capacitors age the value usually grows. Meaning a 200uf capacitor after 15 or 20 years may read 300uf, hence the tolerance in the circuit. If the tolerance is to much it will affect the performance of the amplifier and you really should try to keep the total capacitance in the range the circuit calls for.   
These are becoming harder to obtain in the higher heat range without having to spend an arm and a leg to get them. Please ask all questions before purchasing them they are being offered as is no return as with any electronic component they can be damaged if not correctly used. The top screws for the capacitor are included. Thanks for looking.