... book strap/book ties,Book strap,Magic book strapFeatures and usage: 1) Made of 100% nylon. 2 ... ) Self-gripping, infinitely adjustable and reusable. 3)Width: 16mm,20mm,25mm,30mm,38mm, ... fixed goods etc. 5) Color : Available in Black and white, other colors can be dyeing as your request. ... 6) All products have passed ROHS & SGS, and use environmental protection raw material to dye, conform to ...