Spanninga Presto rear light This compact rear light is handy for any bike. It is a real lightweight. The light is ideal for those who want to quickly put a light on the back of their bike. The rubber ring makes it easy to attach the light to your luggage carrier. The rubber ring can be placed around tubes between 2.5 and 3.5 cm. Specifications: Color: black, red Gender: unisex Material: plastic Length: 12 cm Batteries: yes included (2 x LR44 batteries) Mounting: rubber ring (around tubes between 2.5 and 3.5 cm)