Grow and propagate your own indoor garden with a test tube glass and wood propagation station. This listing is for a single glass propagation station. This glass test tube is excellent for growing or rooting indoor plant cuttings. These make great gifts for anyone and are great for starting indoor plants. The long thin glass tube design is great at allowing the water to warm up slightly in sunlight. This helps promote faster rooting of plants. These fit nicely in windowsills, tables, desks or anywhere there is natural light.