A double-decker roller conveyor is a type of conveyor system that consists of two levels or tiers of rollers for transporting items or goods. This design allows for increased efficiency and space utilization compared to single-tier roller conveyors.

Double-decker roller conveyors are commonly used in industries such as warehousing, distribution, manufacturing, and logistics, where efficient material handling and space optimization are essential. They offer a versatile solution for transporting a wide range of items in a compact footprint, making them suitable for various applications and environments.