HP 10440A / Agilent 10440A Miniature Passive Probe, 100:1, 2m for 16532A, 1660 Series and maybe more

The Agilent 10400 miniature probe family offers modular construction, superior electrical performance, and high reliability. The narrow sharp probe tip is excellent for probing surface mount technology.
10 Mohm//2pf For 1Mohm//6-14pF Inputs