PN 371 (IS) Expandable Internal Shock Absorber Twin Lanyards Ref : PN 371 (IS) Made of 44mm Tubular webbing. Relaxed Length 1.4m to 1.6m & Expanded length 2.0m. Conforms to EN 355:2002 Attachments : PN 112 at one end and two Steel Scaffold Hooks PN 131 at other ends