Minecraft wiki entry for Metadata_variants, associated text: 1 Blocks resulting from extreme data values
1.1 Seamless stone slabs
1.2 Six-sided blocks
1.3 Weird piston
1.4 Granite, polished granite and diorite bells
1.4.1 Bell-less Block
1.5 Locked Smoker, Blast Furnace, Lectern, and Barrel
1.6 Smokeless Campfire
2 References