glow in dark, asolutely round shape, accurate diameter(2.94-2. ... guranteed.2kg/roll, 1kg/roll PLA filament 3mm/1.75mm glow-in-dark ,black,white, transparent, blue, red , yellow, green,orange ... , Ultimaker and so forth in assorted diameters since 2009. Esun glow in dark PVA PLA ABS filament welding rod for 3D ...