Granite kitchen sinks New at Hamat Onyx 779930 onyx50 - Single huge granite flat mount sink, fits an... onyx60-779917 onyx60 - Single huge granite flat mount sink, fits an... onyx60s-779916 onyx60s - Flat mount granit, fits a 60 cm cabinet. Onyx 779919 Kitchen sink matching Harsa's Chef series, flat mount granit sink,... 0nyx80- 779920 0nyx80 - Double kitchen sink from granite for flat mount,... Onyx 779918 onyx40 - Single granite sink for flat mount, fits a...