• Protect light sensitive contents • Borosilicate glass for thermal shock resistance • Enhanced graduations and marking spots are permanent white enamel • GL screw threads • Liner-less, autoclavable (140°C max.), polypropylene orange caps included • Drip-free polypropylene pour rings included Low actinic bottles provide a shield to protect light sensitive products. Low actinic treatment permits less than 1% transmission below 400nm and reduced (5%) from 400-600nm as compared to untreated clear borosilicate glass. Bottles are provided with enhanced graduation scale, orange polypropylene cap and drip-free pour ring included.