FA series

A1, A2, A3 (Cone Angle): A1 is the smallest, A3 is the biggest.
CR ( Curvature Radius): CR50 means tip apex curvature radius is 50nm, total diameter is under 100nm.

Example:

MSCT-FA050TPL038TC06A1-CR500

It means
•FA Series with 0.5mm wire diameter
•Total Probe Length (TPL) is 38mm
•Taper Cone Length (TC) is 6mm
•A1 cone angle type
•Tip apex curvature radius (CR) is 500nm, total diameter is under 1000nm