Pack of ten 0.4mm diameter probes - short length. All Plasma Pen stainless steel nano-probes are unique to our device, screw-in & adjustable. Probes come in packs of 10 and each sterile probe is individually and hygienically sealed with a unique lot and expiry date. All probes are disposable and to be used for one patient during one treatment session. Probes can be bent/adjusted at will for precision treatment.