Full Chrome/full vegetable/semi chrome tanning thickness: 1.2-1.4/1.4-1.6/1.6-1.8/1.8-2.0 mm or any customize thickness selection: a/b/c/d -10/20/30/40% and selection e/f/g/h - 25% each. any 3 types selection can be customized. Color: natural. white, black , beige, drum dyed. Size: 14 sft up all sides, 12 sft up all sides.