Sits on top of donut spare tire to help support the compartment lid. This one is from a leaky trunk
(http://media.use.com/images/s_2/0b2678598c9cd4f3542e_1.jpg) (http://www.use.com/0b2678598c9cd4f3542e?p=1)
(http://www.use.com/images/clicklarge3.gif) (http://www.use.com/0b2678598c9cd4f3542e?p=1)
(http://media.use.com/images/s_2/0b2678598c9cd4f3542e_2.jpg) (http://www.use.com/0b2678598c9cd4f3542e?p=2)
(http://www.use.com/images/clicklarge3.gif) (http://www.use.com/0b2678598c9cd4f3542e?p=2)