KLP® Mainline Installations KLP® Hybrid Polymer Sleepers: High-quality ductile polymer, reinforced with steel. Strong, stable, sustainable, recyclable. Images Video Installation in Sweden Tamping in France Locations Austria, 2016 Sweden Kalmar 2016 Netherlands Amsterdam 2015 France Ligne Serqueux 2013 Germany (VBK) 2018 Germany (DB) 2017 Malaysia, Prasarana 2017 Malaysia, Prasarana 2016