Disposable Specula, 4mm, Pack of 12 $3.50 Disposable Specula - For otoscope models 3420 and 3470. 12 specula per box. Made in USA by Welch Allyn. 4mm size. Quantity ADD TO CART SKU: PRE34804 Add to wishlist You must be logged in to access the wishlist feature. Login or Register Add Disposable Specula, 4mm, Pack of 12 to your wishlist Priority Lowest Low Medium High Highest Comments × Add To Wishlist Wishlist Updated Disposable Specula, 4mm, Pack of 12 has been added successfully to your wishlist. ×