You're looking at 500ml (17 fluid ounces) of water based, odor-free, irritant-free, non-toxic, environmentally friendly, black leather burnishing gum (available in various sizes and colors).
Simply apply a small amount to the flesh side or edge of your leather, spread evenly then firmly work into the leather with a smooth wooden dowel or piece of scrap, reapply as necessary and leave to dry.
Excellent for burnishing edges as well.
The fibers will be compacted and a glossy finish will appear leaving the flesh side of your leather so smooth and attractive it won't even need any lining!
An excellent Tragacanth replacement. No more foul smelling Tragacanth preservative, no more skin irritation. This formulated paste is what you've been looking for, for years! 500mls will burnish several entire cow hides!