CEL RBX-PLA-BL092 PLA Filament, Black as Night Each reel is sealed in a reusable zip lock bag with a sachet of silica gel to control moisture Included on the reel is an eeprom which can be read by a Roboxdevice Filament diameter 1.75 mm Length (meters approx.) 250 Compatibility Compatible with any printer which accepts 1.75 mm filament; The Eeprom requires a reader which is fitted to all Robox units