AVANT-GARDE CHOCKS Easy removal for a safe and stress-free handling ALPHACHOCKS MAX is state-of-the-art technology. Capable of holding the biggest of airliners and military cargo airplanes. The collapsible system, allows you to lock the chock under the wheel. Weight: only 3kg (6.6lbs)MTOW: 350t (780,000lbs)Wheels size: 125cm (49.2in)Mechanism: collapsible technique DIMENSIONS: Length: 30.2cm (11.9in)Height: open 24.3cm (9.6in) closed 5.6cm (2.2in)Width: 20.2cm (8in)Colors: black Made 100% in Switzerland The goal for this chock was to be incomparably light weighted yet incredibly robust. Using highly technological advanced computer softwares and first-class Swiss Engineering we achieved our goal. With its unique combination of carbon fiber composite materials and production technique called aCC-Process (Automated Compression Composite Process), ALPHACHOCKS MAX will perform better being the lightest yet strongest chock of its kind on the market.