Series R158 - snap-open on both sides in the outer radius 1. Snap-open lids along the inner and outer radius 2. Snap-open from the side, covered pin/bore connection 3. Effective chip protection even against hot chips 4. Double stop dog for strong unsupported length 5. Lateral glide surfaces for side mounted operation 6. Universal KMA mounting brackets with attachment capability on all sides 7. Space-efficient with optimized ratio of inner dimension to outer dimension Inner widths Bi: 1.57 up to 7.87 (40 - 200 mm) Bending radii R: 3.94 up to 9.84 (100 - 250 mm) Pitch: 1.81 (46 mm) per link = 7 links/ft (22/m) When to use Series R158 "E2 tubes" If hinged, snap-open accessibility along inner or outer radius is required If a low-cost, lightweight Energy Tube for many types of applications is required If flush attachment is required If chip-repellent features are required When not to use Series R158 "E2 tubes" If snap-open accessibility along both radii simultaneously is required System E4/100, Series R770 If particularly quiet operation is required Model R, series R58