Made from low actinic, code no. 7740 borosilicate glass with red stain, these heavy-duty bottles are ideal for storing/transporting chemicals sensitive to light in the 3000 to 5000 Å range (300 to 500 nm). Bottles include a linerless, one-piece autoclavable, orange polypropylene, plug-seal screw cap with drip-free pouring ring.