Gr8 Garden Heavy Duty Wheelbarrow 65l Litre Galvanised Steel DIY Outdoor Wheel Barrow Pneumatic Trolley Cart DIY Builders Gardening Tool. If you are planning on pottering around the garden with ease this summer then this 65L steel wheelbarrow will allow you to do just that. Made from durable galvanised steel, you will be assured that it will withstand the temperamental British weather easily. It has a maximum weight capacity of 80kg so you can carry around heavy items from one side of the garden to the other without breaking your back.