Gun Shot Residue Single Element Kit Back Catalog number: 52257 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71940 1-Methyl-1-cyclopentene Price on request 94833 CLP Semi-Volatile Calibration Mix #1 Price on request 9755.17-K-IO iso-Butyl n-pentyl phthalate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. Price on request