Lens cap for a lnes with a filter dimater of 77mm</br></br>Product Description</br></br>The <b>Canon E-77II Snap-On Front Lens Cap</b> fits lenses with a 77mm filter thread. It protects the front element from dust?? smudges and scratches when not in use.</br><br/>http://www.amazon.com/gp/product/B00A2BWBNQ