The V8901-LMS-ESD Pen-Vac kits feature a silver aluminum body. Vacuum is generated by pressing and releasing the vacuum push button. Rear storage cap for probes and cups. Unit is 5-3/4" long and 1/2" in diameter. Includes two of each size cup on one bent and one straight probe. Cup sizes are 1/8" (3.18mm), ¼" (6.35mm), 3/8" (9.53 mm) diameter.