This 4-shelf shelving unit from Amazon Basics is constructed from durable steel with a black-coated finish. It features adjustable levelling feet for enhanced stability on uneven surfaces. The shelves are height-adjustable in 2.54cm increments without the need for tools. Each shelf has a weight capacity of up to 160kg when evenly distributed, with a total maximum load weight of 640kg. Guardrails are present on the edge of each shelf to prevent items from falling. This versatile unit is ideal for storing household essentials, appliances, dry food, tools, and other accessories in kitchens, bathrooms, living rooms, or gardens.