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).