Tips: switch to the next size when your measurement reaches the maximum length. Has only a cut out design for outboard. 11-24 ft for outboard and inboard. Upgraded material: made of durable solvent dyed 420D fabric with double PU coating. High colour fastness provides maximum weather and damage protection. Professional design: double seams with reinforced straps to reduce the ingress of water from the seams. Additional protection reinforcements at the back corners, centre and front provide additional protection for important parts. Rear vents allow moisture to escape from the inside. A reflective strip provides extra visibility and safety. Easy to use: the elastic cord in the bottom hem ensures a tight fit. Quick release buckles and strap system ensure easy installation. Perfect for trailers and storage. Free mesh storage bag included. Buy with confidence: If you have any questions, please at any time. To improve the waterproofing and prolong the life of the cover, it is strongly recommended to use support rods to avoid water accumulating in the middle of the cover. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.