1.the material: natural rubber 2.specifications:the diameter is 5cm ,the width is 3mm 3.the color is red ,yellow ,blue ,green 1.the material: natural rubber ,the quality is good.2.specifications:the diameter is 5cm ,the width is 3mm.3.the color is red ,yellow ,blue ,and green .we have have other colors ,we can make according to your requirments .4.Usage:use in office and bank ,or for play .5.the ...