1.material :natural rubber ,four color mix . 2.specifications:the diameter is 15mm.the thickness is 12-13mm. 3.good quality . 1.material :natural rubber ,the quality is good ,and the elastic is good .2.specifications:the diameter is 16mm.the thickness is 12-13mm.3.Usage:use for baby hair .4.we have many colors .red ,green ,yellow ,blue ,pink ,purple ,and so on ,5.the packaging is 250pcs/bag , ...