Straight Line Tracking (SLT) keel design provides sure tracking, even on frozen, rutted trails Lightweight and durable (5.5 lb. [EU: 2,50 kg] with handle loop, mount shoe and keel blade) SLP's patented Rocker Keel design Tuned flexibility with maximum strength Even less steering effort than the original Ultra-Lite Ski Designed to accept SLP's chromoly keel blades and carbides for maximum reduction of darting Order ski mounting shoes, carbides and keel blades separately 39-1/2" L X 6-1/8" W (EU: 100,33 cm L x 15,56 cm W). SKI ULTRA/LT SLT WHITE