... round shape, accurate diameter(2.94-2.98mm,1.7-1.74mm), no bubble,high tenacity and stable melting ... lights, it glows green in dark! It's perfect for haunted houses, radioactive bunnies, or ceiling star constellationsCharacteristic 1. ... ,1.7-1.74mm), no bubble,high tenacity and stable melting point,which is popular in the 3D printer like ... glow in dark PVA PLA ABS filament welding rod for 3D printer