Extremely smooth running due to special castors oslash 50 mm made from polyurethane and polyamidethis storage case is a sturdy mobile aluminium box in that provides zarges quality long service life and is a reliable companionoptimum mobility through integrated 50 mm castors and pull out handle or second sprung drop handle on the end facethe k 424 xc range is rounded off by a wide selection of carefully thought out interior fittings and numerous solutions for easier handling