Check the listing for details. Gas Strut 700mm-800n x2 (10mm Shaft) Caravans, Camper Trailers, Canopy Toolboxes. Condition: New. Listed at 41.77 USD. Designed for caravans, trailers, 4WDs, toolboxes, marine, and industrial uses. Heavy Duty Gas Struts 700mm 100-1200N for Bonnet Trailers Canopy Toolbox. 4wd Tray & Canopy Accessories. Sheet Rubber & Carpet Matting.