... , 3.Affordable and functional: 4.durable service 5.high quality WE are the professional technology-intensive industry,which is ... stainless steel,iron,ect. It can option )Roller Material nylon (POM,nylon,glass fiber,etc. It can option )Type (2RS ... ZZ ,Z ,RS,OPEN (metal or nylon) It can option)Size 4*18.5*7mmColour blackPacking details1 ... door and window , other furnitures etc. 6.Our factory