Three sides of 1118 Series Open goRAIL have T-slots for slide-and-lock building. The open slot within the fourth slide allows lead screw nuts to protrude and be fastened to other components. This signature feature makes it the go-to component for supporting linear motion driven by lead screws. This bundle of 12 pieces of 118 Series Open goRAIL, each of a different length, opens the door to new kinds of structure and motion assemblies in your build. Bundle Contents: 1118-0024-0043 1 1118 Series Open goRAIL (43mm Length) 1118-0024-0048 1 1118 Series Open goRAIL (48mm Length) 1118-0024-0072 1 1118 Series Open goRAIL (72mm Length) 1118-0024-0096 1 1118 Series Open goRAIL (96mm Length) 1118-0024-0120 1 1118 Series Open goRAIL (120mm Length) 1118-0024-0144 1 1118 Series Open goRAIL (144mm Length) 1118-0024-0192 1 1118 Series Open goRAIL (192mm Length) 1118-0024-0240 1 1118 Series Open goRAIL (240mm Length) 1118-0024-0288 1 1118 Series Open goRAIL (288mm Length) 1118-0024-0336 1 1118 Series Open goRAIL (336mm Length) 1118-0024-0384 1 1118 Series Open goRAIL (384mm Length) 1118-0024-0432 1 1118 Series Open goRAIL (432mm Length)