This kit contains five bent probes with 3/32” (2.38mm), 1/8” (3.18mm), 3/16” (4.76mm), 1/4” (6.35mm), and 3/8” (9.53mm) Static Dissipative Buna-N diameter vacuum cups, as well as four straight probes with 1/8” (3.18mm), 1/4” (6.35mm), 3/8” (9.53mm) and 1/2” (12.70mm) diameter vacuum cups.