ITP Straight Styli - Type B - Ruby Ball - M5 Thread x 20.15mm Overall Length - THM5002510020ITP Straight Styli Type B with Ruby Ball is a precision probing stylus designed for everyday metrology tasks. Built around a exceptionally rigid tungsten carbide stem, it delivers dependable stability and accuracy for standard measurements. Thread: M5 external thread for secure, compatible attachment to common probe heads and fixtures. Tip: Ruby ball tip (Type B) provides a hard, smooth contact surface that enhances repeatability during probing;