Does this work for the cardiology IV?

Yes. All current Littmann stethoscopes (with the exception of electronic models) have similar components. The Cardiology IV has a 1.3 inch (3.3 cm) bell and a 1.7 inch (4.3 cm) chestpiece. The Classic III, which I purchased, has identical dimensions. Both share the same double-sided turnable diaphragms, such as this replacement kit contains.

Will this fit cardiology model 3 purchased around 2003?

Hello - thank you for your question. Unfortunately, this spare parts kit will not fit that model. Please connect with our team at 1-800-228-3957 (Monday – Friday 7:30 AM – 6 PM CST) and they will be able to assist with providing the correct model number. We look forward to speaking with you soon.

What is the diameter of each of the diaphragms?

Hi Julia! The Classic III Stethoscope has a double-sided tunable chestpiece. The approximate chestpiece diameters are: Adult side 1.7"/4.3cm Pediatric side 1.4"/3.4cm Let us know if you have additional questions!

buenas tardes sera compatible con classic ii y con classic ii se

Debe obtener el repuesto para classic II

3m Littmann Stethoscope Spare Parts Kit Classic Iii Black 40016

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

🎧 Upgrade your stethoscope game with precision and style!

MADE IN THE USA - Trust in American craftsmanship that meets the highest standards for medical equipment.
LIGHTWEIGHT COMPACT - At just 0.03 kg and compact dimensions, these parts keep your stethoscope agile and ready for any clinical challenge.
AUTHENTIC LITTMANN QUALITY - Ensure reliability and durability with genuine replacement parts that fit your Classic III stethoscope perfectly—no compromises.
SLEEK BLACK POLISHED FINISH - Maintain a professional and stylish look with polished black components that complement your medical gear.
PRECISION TUNABLE DIAPHRAGMS - Switch seamlessly between adult and pediatric auscultation with single-piece tunable diaphragms designed for crystal-clear sound clarity.

The 3M Littmann Stethoscope Spare Parts Kit (Classic III, Black, model 40016) includes tunable single-piece diaphragms for both adult and pediatric sides, crafted from durable plastic and silicone. Designed for perfect compatibility with the Classic III stethoscope, these genuine parts ensure optimal acoustic performance and a polished black finish. Lightweight and made in the USA, this kit is essential for professionals seeking reliable, high-quality stethoscope maintenance.

Specifications

ASIN	B004HFLWHY
Brand	Littmann
Brand Name	Littmann
Color	Black
Colour	Black
Customer Reviews	4.7 out of 5 stars 9,795 Reviews
Exterior Finish	Polished
Exterior finish	Polished
Global Trade Identification Number	00707387773007, 00707387783969
Is Electric	No
Item Dimensions L x W	10.2L x 7.6W centimeters
Item Weight	0.03 Kilograms
Item weight	0.03 Kilograms
Manufacturer	3M Littmann
Material	Plastic, Silicone
Model Name	40016
Model Number	7100137383
Number of Items	1
Number of Packs	1
Part Number	7100137383
Product dimensions	10.2L x 7.6W centimeters
Recommended Uses For Product	listening to heart/lung sounds, pediatric use
UPC	707387783969
Unit Count	1 Count

Reviews

I**G

Fits perfectly

The delivery was timely, and the spare parts are genuine Littmann products. They fit perfectly with the Classic III stethoscope.

11.06.2025

J**E

Excelente compra de renovación

Excelente kit para renovar el estetoscopio Littmann

29.07.2026

F**Y

Much fitting good

It work good. Now tick tick sound boom boom. Pops on make broken into not broken. Favorite scope now scope again. Always keep extra in wallet for emergency.

5.09.2026

C**N

Ottimo prodotto.

Tutto come da descrizione. Ottimo

1.02.2026

J**R

Good replacement parts

Got these as replacement parts for my Littmann and they work great. The ear tips and diaphragm seem really durable and fit perfectly. Nice to have a kit like this instead of having to buy everything separately. No complaints so far.

3.09.2026

R**S

Classic III

Fits and works well for my classic III.

24.06.2026

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5 days ago

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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TrustScore 4.5 | 7,300+ reviews

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The product quality is outstanding. Exactly what I needed for my work.

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