GIVI Monolock E30RNMALD E30RNMALD Weight of case: E30 = 6.25 lbs, the E450 = 8.47 lbs Weight of case: B37 = 9.7 lbs, the B47 = 9.95 lbs Color: E30/E450/B37/B47&nbsp; Matte Black w/Red Lens Color B37/B47 Tech Matte Black w/Smoke Lens Material: Polypropylene