Exotic Nutrition's O-Ring Syringes are of superior quality with EZ-Glide O-ring silicone gaskets that are super smooth and glide easily. Double O-Ring design Latex free, 100% pure Silicone Slip-Tip style syringes can be used with or without Nipples. Luer-Tip style syringes must be used with silicone or latex nipples (sold separate) Nipples fit all Luer-Tip syringes and the 3 mL Slip-Tip syringes. 1 ml - Suggested for: Baby Squirrels, Baby Sugar Gliders, Opossums, Baby Rabbits and other small mammals - birth to weaning. 3 ml - Suggested for: Small Baby Mammals such as Racoons & Opossums (4 weeks to weaning). 5 ml - Puppies & Kittens 3 weeks and older and larger mammal babies. DIRECTIONS: When feeding your animal, angle the feeder toward the cheek to prevent choking. Dispense slowly. Feeding Instructions: Different animals have specific feeding guidelines and schedules. See our feeding instructions for common exotic animals here. Got Questions? Browse our free Blogs for more information or Contact Us with any inquiries regarding our products.