Blanco Metra 45 S - Silgranit inset sink The Metra range from Blanco is of a modern contemporary design dominated mainly by swathes of flat surfaces, and tight radius corners. Perfect design features to sit well within the modern kitchen looks very much en vogue today. The full range of Blanco Silgranit Puradur colours is available ensuring a match is assured for your own design. A couple of accessories are available to enhance the sinks practicality further, which already boasts a drainer overflow/waste and a main bowl pop up basket waste.