We can supply Window Sills (Granite Window Sills, Granite Threshold) as per your customized requirements. Material:natural granite,marble,quartz stone,etcRegular Size: 60 ... .Popular granite stone colors for window sills:G602, G603, G664, G687, G635, G636, G614, G655, G654, G611, G682, G681 ... slabs, tiles, tombstones, kerbstones, cube stones, etc. Window Sills (Granite Window Sills, Granite Threshold)