Welch Allyn KleenSpec Disposable Specula is made of nontoxic plastic. Compatible with Welch Allyn MacroView Otoscope and 3.5V Diagnostic Otoscope. Specula is 2.75 MM. 34 pieces per pack.Includes:1 sleeve of 34 Shipping Details Shipping Type: parcel Free Shipping: true Specifications Allergens: Contains No Allergens Certifications: Not Applicable Grade Level: Not Specified SUOM Description: Each Brand Name: Welch Allyn Description: Disposable Specula 2.75mm Material: Plastic, Metal