Kota Black is a type of limestone, often used in construction and architecture due to its durability and aesthetic appeal.

Similarly, Kota White Granite is a type of granite known for its white or light-colored appearance

The "30" might refer to a quantity, possibly indicating 30 units or bundles of Kota Colour dope dyed yarn."Kota Colour" likely denotes the brand or type of dope dyed yarn. It may have specific characteristics or be known for its vibrant colors.