A 32G x 2.5mm (or sometimes 32G x 3mm/4mm in similar micro-needling categories) mesotherapy needle is a, ultra-fine, short hypodermic needle designed for shallow, precise intradermal injections. It is primarily used for facial, neck, and scalp treatments to minimize pain, bruising, and patient discomfort. 

Key Features & Description:

Gauge (32G): Indicates an ultra-fine, thin-walled needle (approx. 0.23mm–0.26mm outer diameter), allowing for gentle, near-painless insertion.

Length (2.5mm): A very short needle specifically designed for superficial, intra-epidermal, or papillary dermis injections, often used in "micro-mesotherapy" or "S.i.t" (Skin Injection Therapy) to avoid reaching deeper nerves and vessels.

Material: Usually constructed from high-grade, medical-grade stainless steel.

Design: Often features a sharp, tri-beveled tip for easy penetration and is typically compatible with Luer Lock or Luer Slip syringes.

Sterility: Single-use, sterile, and non-toxic (typically EO gas sterilized).