This Romsons blue endo bronchial plain suction catheter is the best. It comes with a universal funnel shales connector for a safe connection to the standard suction equipment. The size of the catheter is 6,8,10,12,14,16,18 FG. Its effective length is 50 sm and the total length is 53 cm. The color of this bronchial plain suction catheter is blue. These are sourced from the most reliable medical consumables vendors. Romson products are widely acknowledged in the market for high quality.