1) aluminium and copper with or whithout silicone 2) 3.5mm 6mm 3) different color Details:1) aluminium or copper rings2) with or whithout silicone3) 3.5MM X2MMX2MM ,3.4MMX3MMX6MM, 3.5MMX2MMX6MM2.8MMX2.3MMX7MM4) different color : Brown,light brown,black,,auburn,coffee.blond,etc5)packing:1000pcs/bot ,500pcs/bot,250pcs/case,etcHAIR RELATED PRODUCTS:Hair weft/bulk/weave,clip in hair extension,pre- ...