... and usage of Hot hair rollers:1) Mateial: Nylon2) Nylon Hair Roller is popular in Korea,Japan,European,USA...,.Used ... for hair curl. This is the hot-sale producct.3) Recycle used and durable ... Hair roller is popular in Korea and Japan. It can be Used for hair curl. This is ... the hot-sale producct.2) Recycle used and durable..SpecificationDiameter:15mm,18mm,20mm,25mm,28mm, ...