These Ardes syringes are a popular choice. High quality, durable, long lasting nylon syringes at economical prices. Have been field proven for over 30 years. Clear plastic barrel has bold, black-inscribed numbers and orange handles. These syringes have a luerlock/luerslip needle holder. Autoclavable up to 260 degrees Fahrenheit. Ardes syringes are available with dose nuts to allow dosage adjustment by simply turning the nut to the required setting for multiple injections. All syringes come with spare o-ring.