Channel Master Endoscope Cleaning Brushes with rounded brush tip. Scope has a combination valvecleaning brush for gastroscope/colonoscope. Non-sterile, disposable, and latex-free. Biopsy channel ranges from 2.0-2.4mm, Shaft O.D. 1.7mm. Brush diameter: 7.9mm/6.4mm and Brush length: 29.2mm/7.4mm. Shaft length: 230 cm. Packaging: 50/Box.