1. Material:ABS 2. Size:20mm,35mm,50mm 3. Various style and special design are available. 4. Streamline surface looks nice and elegant.Three types(round,square,triangle) are available.can adjust thicknesss,use for any kinds of fabric.5. Colors:Chrom -matt,Steel-matt,Brass-antique ,Copper,Metallic Mango,Metallic blue etc,also can according to customer's requirements. Plastic Curtain Ring