Product descriptions:item no.: rm-t001 name: sit-on top kayak trolley material: aluminium tube uv-resistan soft pvc protective sleeve wheels: 3.0-4 inflatable tires or foam-filled rubber tires surface treatment: anodization or powder coating loading capacity: 45kgfeatures:ideal design for sit-on top kayakssupport frame can be adjusted easily with the clips lightweight and foldable design make it easy to carry and store durable soft rubber protective sleeve to avoid any damage of your boat color can be customized.