4 Spools Glowing in Dark PLA Filament Bundle: It Included 4 Most Popular Glow in Dark Colors in One Box: Glow in Dark Green/Blue/Purple/Rainbow; Each Spool Weight is 0.25kg, 4 Spools Packed, Total is 1Kg 3D Printing Material, It will Glowing in the Dark after Absorbing UV Light. Before Glowing, The Filament is White/Natural Color, After Exposure 30 Mintues to Strong Sunlight or UV light, It Will Get An Amazing Glow Light Effect | Widely Compabile: This Amazing Color is Very Suitable to Print Various Luminous Glow Dark Beautiful 3D Print Objects, Especially for Celebration, Holiday Gift, etc; It's Great Choice and Gift Pack for 3D Printing; It's Normally Exposure 30 Minutes Enough, Too Long and Too Strong Exposure May Damage the Glow Filament | Widely Support for FDM 3D Printer: 100% New Raw Material, Advanced Glow Raw Materials, High Quality Controlled, Mostly Support for All Brand FDM 3D Printers on Market, High Precise Filament Diameter Tolerance, All Glow Filaments on Market Are a Bit Brittle Compare Normal PLA Filament; To Start a Better Printing, Please Print with Patience and Keep Filament Angle Smoothly When Feeding | Tangle-Free and Easy to Print: Excellent Production Line Controlled, To Reduce Warpage and Shrinkage, To Make Sure Printing with No-Bubble and No-Jam, It’s Well Wrapped and Tangle-Free, It’s Easy to Print and Smooth Extrusion with Stable Printing Performance, Pls Kindly Fix the Filament End Every time after Printing | Package and Satisfaction Warranty: Each Spool Filament is 250g, 4 Spools Packed in One Box. High Quality Guarantee and Premium Customer Services within 24 Hours Reply. If You Have Any Question with This Filament, Please Kindly Contact Us at ANY TIME