{"product_id":"stigma-tattoo-needle-cartridges-7rl-round-liner-50-pack-eo-sterilized-membrane-safety","title":"STIGMA Tattoo Needle Cartridges 7RL Round Liner 50-Pack — EO‑Sterilized, Membrane Safety","description":"\u003cp\u003e\u003cstrong\u003eSTIGMA #12 (7RL) are single-use, EO-sterilized round liner cartridge needles with a membrane barrier, sold in a 50-piece professional pack for tattoo artists.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese EN05-series cartridges pair surgical-grade 304 stainless steel needles with medical-grade plastic housings and a built-in membrane to reduce ink backflow. Designed by tattoo artists for tattoo artists, the cartridges arrive individually blister-packaged and are ready to snap into any standard cartridge-compatible tattoo machine or grip. The 7RL configuration makes them well suited for precise line work and detailed shading where controlled ink flow and a reliable tip geometry matter.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these cartridges prevent ink backflow and keep my machine cleaner?\u003c\/h3\u003e\n\n\u003cp\u003eEach cartridge includes a soft rubber membrane inside the housing that blocks liquid from traveling back into the machine tube. This barrier helps reduce the risk of contamination of the grip and rotary or coil components, lowering cleanup time between sessions.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMembrane barrier stops ink from entering the cartridge tail.\u003c\/li\u003e\n  \u003cli\u003eMedical-grade plastic housing adds an extra seal layer.\u003c\/li\u003e\n  \u003cli\u003eSingle-use design eliminates reprocessing and cross-contamination risks.\u003c\/li\u003e\n  \u003cli\u003eBlister packaging keeps cartridges sterile until opened.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes the 7RL round liner geometry suitable for detailed line work?\u003c\/h3\u003e\n\n\u003cp\u003eThe #12 (7RL) groups seven needles in a tight circular formation, producing a clean, consistent line with controlled ink deposit. The rounded tip slope in the EN05 design offers a predictable contact point for fine outlines and crisp details, while still allowing for light shading when needed.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eTightly clustered seven-needle round for fine lines and precision.\u003c\/li\u003e\n  \u003cli\u003eSlope-shaped tip for smooth skin contact and consistent ink flow.\u003c\/li\u003e\n  \u003cli\u003eAppropriate for outlining, micro-lines, and small lettering work.\u003c\/li\u003e\n  \u003cli\u003eAlso usable for subtle dotwork and controlled shading techniques.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these cartridges compatible with my tattoo machine and how easy are they to use?\u003c\/h3\u003e\n\n\u003cp\u003eSTIGMA EN05 cartridges are built to fit industry-standard cartridge grips and machines, making them a quick plug-and-play option for most setups. The rubber band loading and tactile snap fit mean fast changes during sessions and reliable seating without extra tools.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with standard cartridge-style grips and machines.\u003c\/li\u003e\n  \u003cli\u003eSnap-in installation speeds up needle changes mid-session.\n  \u003c\/li\u003e\n  \u003cli\u003eRubber band load secures needles for stable performance.\n  \u003c\/li\u003e\n  \u003cli\u003eIndividually blistered and EO-sterilized for immediate clinical use.\n  \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow are these cartridges sterilized and packaged for professional use?\u003c\/h3\u003e\n\n\u003cp\u003eEach cartridge is sterilized using ethylene oxide (E.O.) and sealed in a blister pack to maintain sterility until opened. Materials are surgical 304 stainless steel for the needles and medical-grade plastic for housings, complying with professional expectations for disposables.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eEO-sterilized and individually blister-sealed.\u003c\/li\u003e\n  \u003cli\u003e304 surgical stainless steel needles resist corrosion and maintain sharpness.\u003c\/li\u003e\n  \u003cli\u003eMedical-grade plastics for durable, consistent housings.\n  \u003c\/li\u003e\n  \u003cli\u003ePack of 50 provides value for busy studios and apprentices.\n  \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Tattoo artists, apprentices, and studio owners who prioritize predictable line quality, convenient cartridge swaps, and added protection against ink contamination. The 7RL configuration in a 50-piece value pack suits artists who do frequent linework, small lettering, or detailed pieces and want ready-to-use, sterile cartridges that fit standard machines.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I reuse these STIGMA cartridge needles?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. These are single-use, EO-sterilized cartridges designed to be disposed of after one client to prevent contamination.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will the 7RL configuration work for shading?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Primarily a liner, the 7RL can handle light, controlled shading, though it's best for outlines and fine detail work.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"STIGMA","offers":[{"title":"Default Title","offer_id":67550876270762,"sku":"B07KWHJS1N","price":67.33,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/8989\/6874\/files\/stigma-front-packaging-50pcs_88ccda66-8e84-4581-8553-dff891b028ac.jpg?v=1790846063","url":"https:\/\/opulora.ca\/products\/stigma-tattoo-needle-cartridges-7rl-round-liner-50-pack-eo-sterilized-membrane-safety","provider":"OPULORA","version":"1.0","type":"link"}