Welch Allyn KleenSpec 521 Series Disposable specula. 

• Convenient, economical, safe and easy to attach
• For Welch Allyn Otoscope models: 20200, 21700, 20202, 20100 and 21600
• 500 per package
• Available Sizes: Pediatric (3mm), Regular (4mm) or Large (5mm)