Cast Stone Sills can be manufactured in White Granite, Brown Sandstone, Portland White and Limestone. They can made to suit timber-frame or blockwork construction. They are made to order. Lead time on sills are generally 7-10 working days from the date of order depending on the size of the order. Please contact a member of our staff to place an order or of you require more details. Available Sizes: 220mm, 250mm, 300mm, 350mm, 400mm, 450mm