A symptom-first guide to persistent air bubbles, loose connections, tube damage, and the measurements buyers should confirm before ordering printer tubing or connectors.
Seller of record and after-sales responsible entity: M&M UNION HONGKONG LIMITED / Trade name: UV INK PRO / Office: H020 3/F, Phase 2, Kwai Shing Industrial Building, 42-46 Tai Lin Pai Road, Kwai Chung, New Territories, Hong Kong / Support: Cathy@icolorpro.com / WhatsApp: +86 186 6466 9614. Prices are displayed in USD. Orders are fulfilled from China or Hong Kong depending on SKU. Returns require written RMA approval before shipment.
