PEN-VAC with five bent probes mounted with cup sizes 1/8″ (3.18mm), 3/16″ (4.76mm), 1/4″ (6.35mm), 3/8″ (9.53mm), 1/2″ (12.7mm) diameter. Three straight probes mounted with cup sizes 1/4″ (6.35mm), 3/8″ (9.53mm), 1/2″ (12.7mm) diameter. Includes Vacuum Pen holder with eight locations for holding your probes and cups.