Gun Shot Residue Single Element Kit Back Catalog number: 52257 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 30091 EPA Method 502/524 Volatile Mix D Price on request 682002 1,4-Dimethoxybenzene, 1000mg Price on request 681684 2-Chlorophenol, 100 µg/ml, Methanol, 5ml Price on request