5 3/4"W x 8"H x 4 5/8"P, Bangor Keystone for use with CRH07X. Keystones are commonly used in conjunction with crossheads, giving them an added appeal and, in turn, increasing the beauty and style of your window or door- Ekena keystones are made from high-density polyurethane, making them lightweight and easy to install, as well as impervious to rotting, cracking and insect infestations-Features- Modeled after original historical patterns and designs-- Constructed from solid urethane for maximum durability-- Lightweight for quick and easy installation-- Factory-primed and ready for paint or faux finish-- Can be cut, drilled, glued and screwed-- Designed for use on both interior and exterior applications-- Material- Urethane