ANNEAU is an open loop sling available in four lengths, color coded for easy identification of length. Description. Open loop sling for setting up anchors. Available in four lengths: 60, 80, 120 and 150 cm. Color coded for easy identification of length. Also available in black. Specifications. Material(s): polyester. Breaking strength: 22 kN. Certification(s): CE EN 566, CE EN 795 B, EAC.