1. Different structures. The second drawer slide rail is composed of outer rail and inner rail, and the third drawer slide rail is composed of outer rail, middle rail and inner rail.
2. Different widths. The width of section II drawer slide rail is generally 17mm, 27mm or 35mm; The width of three drawer slide rails is generally 45mm.
3. Travel is different. The length of the second drawer slide rail can be pulled out is about 3 / 4 of that of the drawer, while the third slide rail can pull out the whole drawer,
4. The use effect is different. Because the three slide rails can be fully pulled out of the drawer, it is more convenient to use than the two slide rails.
