Catheter tubing: Polyurethane material, good biocompatibility, fully radiopaque. Soft tip tubing: different sizes suitable for different catheters, soft and flexible. Catheter extension tubing: transparent polyurethane material,with tight tolerance. Provide post extrusion services:soft tip forming, hole punching and printing. Sizes: Single-lumen: 14G. 16G.18G.20G. Double-lumen:4F.5F.7F.8F.