1.this velcro book strap is 100% made of nylon. 2.Heat, acid and erosion resistant, insulating, durable and anti-aging. ex-w price:usd$032/bagStrong tensile, simple operation, Any color and quantity are available. This product uses 100% nylon and the import environmental protection dye for produces raw material, pass examinations so on ITC, SGS, conform to the European environmental protection ...