Spool for filament in skeins of size 190x90x55. There are many filament spools, but none of them suited my needs. I made one just right. This spool fits on most print beds and prints without supports. It fits in any dehumidifier without a problem. There are no printing requirements. Print as you prefer. The fill rate must be at least 80%. If the parts are difficult to screw in, lubricate the threads with silicone grease. Everything was calculated with some allowance, and there were no problems assembling the coils.