The t5 sl cage is vels lightweight alloy open style bottle cage weighing only 28g this cage is the product of our desire to create a lightweight cage without the use of carbon produced from t5 tempered 6061 aluminium this cage has low weight and high strength characteristics the t5 is light enough for a race use and durable enough to last designed to fit all bikes with a standard seat or down tube mounting 6061 t5 aluminium polished silver finish with laser etched vel logos 28g in