These tiny 90 degree benders will help you reorient the stem to the desired direction for better yield. The following manual training technique is called low stress training (LST), which involves manipulating the shape of plants to produce better yield, while controlling the height and shape of plants. Perform low stress training to create multiple flowering points and let the light distribute more evenly and reach more leaves. Increase light penetration: control the height and shape of the plant to make the canopy uniform so that light can reach all parts of the plant Increase yield: create multiple flow parts in addition to the main stem. Increase airflow: reorient the stem to allow better airflow to help disperse water and reduce the chance of mold growth. Easy installation: gently bend the valve stem back and forth, and then insert the bender into the valve stem. Easy removal: made of bright colors, easy to detect in dense leaves. Easy to find and delete. Reuse: made of PETG, which is a strong, durable and impact resistant plastic. It can be used repeatedly for multiple growth. Size: 3 x 1 cm \/ 1.18 x 0.4 inch package content: 30 x plant bender