Product Name: Two-finger pen position correctionMaterial: soft rubberColor: green, yellow, bluePacking: OPPNumber of products: 3 (magic coat, two colors, 3 colors)  use:1: Baby is a pacifier silicone material, healthy and environmentally friendly, tasteless, five poisons2: Suitable for ordinary pencils, watercolor pens, gel pens3: Suitable for children aged 3-13, effectively prevent the thumb and forefinger from crossing, prevent mistakes, correct children's writing skills