Milacath Long Term Single Lumen IV Catheter Kit includes polyurethane antimicrobial long-term single-lumen polyurethane catheter, introducer, guide wire, additional suture wings, normally closed valve and dilator for double lumen catheters. For long-term use of 21+ days . Integrated extension tubes. Use for venous pressure monitoring, blood sampling, and administration of drugs or fluids. Coated with silver sulfadiazine to help protect the immune-suppressed animal. Size: 14 gauge, 8" L (Image may not reflect actual packaging)