These Narrow Mouth, HDPE, reagent bottles are manufactured from USP Class VI resin that is FDA-21CFR compliant. The amber bottles are designed to reduce UV light transmission to protect light-sensitive contents, and conform to USP requirements for storage of light-sensitive materials. Excellent chemical resistance to most acids, bases, and alcohols. Polypropylene caps are included. Offered in 4ml, 8ml, 15ml, 30ml, 60ml, 125ml, 250ml, 500ml and 1000ml capacities.