glow in dark, asolutely round shape, accurate diameter(2.94- ... and then turn out the lights, it glows green in dark! It's perfect for haunted houses, radioactive bunnies, ... .2kg/roll, 1kg/roll PLA filament 3mm/1.75mm glow-in-dark ,black,white, transparent, blue, red , yellow, green, ... -matic , Ultimaker and so forth in assorted diameters since 2009. Esun glow in dark PVA PLA ABS filament welding rod for ...