Roller a.Durable Performance b.Material : Nylon, Iron, Zinc casting, Stainless steel/ aluminum alloy Window Roller / Rollera.Durable Performance b.Material : Nylon, Iron, Zinc casting, Stainless steel/ aluminum alloyc.Size : various type available d.Finishing : Powder coating/ galvanized1) With over 13 years experiences, we offer excellent quality products with competitive price and 25-30days ...