We have produced series B4503, B 3503 , B3502, B2702, and B1702 ,it's not noly made of cold rolled steel but also the stainless steel ,and we also are developing the big-power carrying slide (200kg),besides, we can also manufacturer the especial slide by the detail drawing or the sample.The steel ball slide-rail of BTL takes the lead in passing ISO 9001 and Germanic DIN6858-82 standard,the win favorable comments from customers by the excellent quality,and far sold to south-east Asia,middle east and the occident.