It's the total weight of the Filament not the specific length of the Filament. As Filament is the blood of your printer and it is very important to use right type of filament.Filament generally comes in 1Kg spool. We can create upto 100 pieces of chess with 1Kg roll os filament. One roll of filament can create approximately 200 keychains. One roll of filament can print approximately 98 phone cases.