The NL-25B is a versatile flange-fixing ball transfer unit (often called a conveyor roller or omnidirectional "bullseye" wheel). Designed for friction-free movement, it is widely used in light-load material handling, assembly lines, and smooth-gliding miniature furniture. Model NL-25B Brand ZH Material Plastic Type precision P0 P6 P5 P4 Product Description The NL-25B is a standard industry code for a flange-fixed omnidirectional ball transfer unit (often referred to as a