PLA+ blue with glow in the dark effect-This PLA+ 3d printer filament contains phosphorescent materials. it's blue in the daylight. Under sufficient time expose to the sunlight or UV light, the filament shall absorbed light energy. It will have bright luminous effect in the dark environment. Please note that too long light exposure time will damage the PLA+ material. Specifications-Diameter: 1.75+/-0.03mm, N.W.:1kg (2.2lbs), G.W.:1.3kg (2.86lbs). Filament Length: 330-335m. Recommend printing settings: Nozzle Temp: 190-210°C. Bed Temp: 40-60°C. Printing Speed: 30-70mm/s. High Quality-dikale PLA pro plus 3d printing filament is nicely automatically winded by machine to reduce tangle rate. This filament is stronger than pure PLA filament. Not brittle and easy to print. And each product has quanlity control before they are shipped out. Widely Compatibility-Dikale 1.75mm pla+ filament luminous color is suitable and compatible with most FDM 3D printer. Such as Creality Ender