These are the TRUEplus syringes, 29G 0.5CC 1/2In. They are a longer style needle because they are ½ inch. This syringe will hold up to 50 units. For your comfort, these feature a silicone coated needle with a precision-cut, tri-beveled needle tip. Use once and discard of in an appropriate container for sharps. Please keep out of the reach of children.