Wow, you may wonder who on earth does the gel blaster use 11-13mm gel balls? the answer is none. These 11mm, 12mm, 13mm gellets are mainly for pot decoration purpose. Although they are seldom used, they are still made with high quality and decent hardness. We can offer a wide range of color of 11-13mm gel balls like red/ orange/ yellow/ black/ blue/ green/ transparent/ mix / white etc,.