EG series use four-row ball under load design, it has high rigidity and high load characteristics, along with four direction load characteristics and self-aligning feature that can absorb installation of assembly error so to obtain a high precision demands;? Plus lower height and shorter length of the slider combination is very suitable for high speed automated industrial machinery and space requirements for small devices. Protection is provided on the slider ball to prevent the ball off, this design is not only to facilitate customer installation linear slide, when the situation will be removed nor slide the ball off occurrence, and have interchangeable in precision permission.