Listings commonly cite polyester and plastic (including PE) for blooms and foliage, with wired or metal-core stems. Some descriptions list combinations such as polyester/plastic/wire.
Many artificial gerbera stems include a wired or bendable core that lets you bend, position, and hold stems for arrangements and displays.
They are described as low maintenance—no watering is required and some listings explicitly state no watering or sunlight is needed.
Sellers offer single stems, bundled sets, and multi-stem packs. Explicit counts in listings include sets of six, six-per-pack bags, and sets of three.
Common colors shown include yellow, various shades of pink (including bright pink), white, red, and multicolor mixes.