Factory Wholesale Medical Silicone Wound Drainage System Disposable Negative Pressure Drainage Ball. Medical Grade Silicone Material: Made of 100% imported medical-grade silicone with anti-reflux valve. Multiple Volume Options: Available in 100ml, 200ml, and 400ml sizes with various marked positions. Broad Drain Compatibility: Compatible with Flat, Fluted, and Round drains for versatile use. Stable Suction Performance: Low-vacuum reservoir design ensures stable and effective suction for exudates. Comprehensive Certifications: Certified with CE, ISO13485, GMP, and FDA standards. OEM and ODM Services: Custom branding and manufacturing services are available. Free Sample Availability: Free samples are provided for evaluation purposes. Sterile Packaging: Comes in sterile blister packaging with Co-60 R-Ray Radiation sterilization.