Contest Rubber - $3.95
Specially formulated 1/8" rubber for ornithopter kits. Far superior to office-grade rubber bands. Use with the lubricant shown below. Fifteen feet in each pack, enough for ten motors.
Rubber Lube - $2.95
Lubricant for rubber band motors allows more turns and much longer flights! Natural, non-toxic castor bean oil in a 1/2 ounce squeeze bottle. Essential for rubber-powered ornithopters.