Snake hide

Snake hide is dropped by snakes on Mos Le'Harmless and bush snakes that appear during the Tai Bwo Wannai Cleanup Minigame on Karamja. Tanners can tan snake hide into snakeskin for 15gp, or 20gp at Canifis.
Swamp snake hide is obtained by using a knife on a swamp snake corpse. These tan for 20gp each, and will not stack with normal snake hide in the bank. Once tanned into snakeskin however, there is no difference between the two, and will stack normally.