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

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3M Littmann Stethoscope Spare Parts Kit, Black, Stainless Steel, Compatible with Classic III, Cardiology IV, CORE Digital, 40016

Product ID: 18369080

Details

Brand
Littmann
Color
Black
Exterior Finish
Polished
Material
Plastic
Product Dimensions
4"L x 3"W

🎧Snap-tight soft-sealing eartips for perfect acoustic seal

🩺Tunable diaphragms for adult & pediatric frequency clarity

❄️Non-chill bell sleeve for patient comfort

$49.10

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Description

🩺 Upgrade your diagnostic edge — because every heartbeat counts!

COMFORT FIRST EARTIPS - Snap-tight, soft-sealing eartips ensure a secure fit and superior noise isolation during critical exams.
SEAMLESS COMPATIBILITY - Specifically engineered for Classic III, Cardiology IV, and CORE Digital models—no guesswork, just perfect fit.
DURABILITY MEETS CONVENIENCE - High-quality replacement parts bundled in one kit to keep your stethoscope performing like new.
PATIENT FRIENDLY BELL SLEEVE - Non-chill design keeps patients comfortable, enhancing bedside experience.
PRECISION TUNABLE DIAPHRAGMS - Switch frequencies effortlessly with patented 3M technology for both adult and pediatric patients.

The 3M Littmann Stethoscope Spare Parts Kit (Model 40016) offers premium replacement components—adult and pediatric tunable diaphragms, snap-tight soft-sealing eartips, and a non-chill bell sleeve—designed exclusively for Classic III, Cardiology IV, and CORE Digital stethoscopes. Engineered for durability, comfort, and acoustic precision, this kit ensures your stethoscope stays clinic-ready with effortless maintenance.

Specifications

ASIN	B004HFLWHY
Best Sellers Rank	#1,110 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Medical Stethoscope Parts
Brand	Littmann
Brand Name	Littmann
Color	Black
Customer Reviews	4.8 out of 5 stars 10,003 Reviews
Exterior Finish	Polished
Global Trade Identification Number	00707387773007, 00707387783969
Item Dimensions L x W	4"L x 3"W
Item Weight	0.03 kg
Manufacturer	3M
Material	Plastic, Silicone
Model Name	40016
Model Number	7100137383
Number of Items	1
Number of Packs	1
Part Number	7100137383
Product Dimensions	4"L x 3"W
Recommended Uses For Product	stethoscope_maintenance_replacement_parts
UPC	707387783969
Unit Count	1 Count
Warranty Description	3M Limited Warranty

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$49.10

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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