... 20g trace BB,Glow in the Dark, Great fun and excitement, high presion, seamless, roundness,polish. ... Trace BB1) Glow in the Dark, Great fun and excitement, high precision, seamless, roundness, polish 2) ... Perfect spheres and no air pockets! 3) ISO 3290-2001 ... 5) diameter = 5.95mm 6) Eco-friendly Materials and Mineral used7) color = white, light blue, black, ...