Dissector injection needles combine a stiff, blunt-dissecting tip with distal side ports so you can create a subdermal tunnel while delivering tumescent or hydro-dissection fluid. Typically manufactured from thin-wall 304/316L stainless steel with a reinforced shaft and Luer-lock hub, they’re offered around 18–22G in gauges and ~50–150 mm in lengths, with optional spatula/olive/blunt cone tips and etched depth marks. Common uses include infiltration and controlled subcision of fibrous septae (e.g., chin/jowl, nasolabial, acne-scar or cellulite planes), release in secondary lipo zones or gynecomastia, and tunnel preparation for microfat transfer. Compatible with syringes or infiltration pumps (via tubing), supplied sterile single-use or as reusable, steam-sterilizable versions per IFU, and typically provided with protective caps, CE marking, and batch traceability.