EXEL 30-35mL Syringe Only, Catheter Tip ECC, Sterile (50/Box). The EXEL 30-35mL Syringe Only is constructed with polypropylene and a positive plunger stop to prevent spillage when drawing. The crystal-clear barrel has easy-to-read, large bold print. Tips available include Luer Lock with Cap, Luer Slip ECC with Cap and Catheter Tip ECC.