Agri-Pro 50 mL Syringe With O-Ring Drench Gun. 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. Clear o-rings are made of silicone. Autoclavable up to 260 deg F. Two sizes of Ardes syringes are available with dosenuts to allow dosage adjustment by simply turning the nut to the required setting for multiple injections. All syringes come with spare o-ring. Made in France.