What is the stem hole size or what size stem are they for ?

Depends on the size of your ear canal opening. I wear the medium in one ear & the large in the other. They all fit the Marvel.

Will these fit Kirkland 9.0 Hearing Aids?

Probably not, and too bad as I find them very comfortable. The are for the Phonak hearing aides released in late 2018. I believe that Costa is selling Phonaks under its Kirkland brand name. The Kirkland 9.0 is the previous Phonak

Will these fit on the new Phonak Paradise hearing aids? They look the same, but not sure if they're the same size on the bottom where you attach them?

Yes these fit the new style hearing aids Marvel and Paradise

Yes, the dome I use are 054-0786. They work very well, for my ear canals.

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Phonak, Unitron & Hansaton 4.0 Dome Open Hearing Aid Umbrellas (Pack of 10) (M - Diameter 8 mm)

Phonak, Unitron & Hansaton 4.0 Dome Open Hearing Aid Umbrellas (Pack of 10) (M - Diameter 8 mm)

Product ID: 421451097

Details

Brand
Phonak
Colour
black
Compatible devices
Phonak Marvel
Item dimensions L x W x H
8 x 8 x 8
Material
Plastic

🎧Compatible with Gen 4.0 Ex earphones

📦Pack of 10 for long-lasting use

🔊8mm diameter for optimal sound flow

Description

🎧 Elevate your hearing game with precision-fit domes that keep you connected and comfortable.

BULK PACK CONVENIENCE - 10-piece pack keeps you stocked and ready, avoiding last-minute runs
NEXT GEN COMPATIBILITY - Works seamlessly with Phonak Marvel Gen 4.0 and select Unitron & Hansaton models
VERSATILE SIZE OPTIONS - Available in S (6mm), M (8mm), and L (10mm) to match your unique ear canal
TRUSTED QUALITY RATINGS - Highly rated (4.7/5) by users who demand reliable hearing aid accessories
PRECISION FIT MAXIMUM COMFORT - Open dome design ensures secure, breathable fit behind the ear

Phonak, Unitron & Hansaton 4.0 Dome Open Hearing Aid Umbrellas (Pack of 10, M size) provide a breathable, secure fit for Gen 4.0 Ex earphones. Compatible with leading hearing aids like Phonak Audéo Marvel, Hansaton Excite, and Unitron D Moxi series, these 8mm domes enhance sound clarity and comfort. Designed for durability and convenience, this pack ensures you stay equipped with premium hearing aid accessories trusted by professionals and users alike.

Specifications

ASIN	B07M5HNRMG
ASIN	B07M5HNRMG
Best Sellers Rank	#150,033 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #51 in Safety Ear Protection Accessories
Customer Reviews	4.7 4.7 out of 5 stars (11)
Customer reviews	4.7 4.7 out of 5 stars (11)
Date First Available	28 April 2019
Global Trade Identification Number	07613275690406
Is Discontinued By Manufacturer	No
Item model number	001
Manufacturer	Phonak
Manufacturer	Phonak
Product Dimensions	0.8 x 0.8 x 0.8 cm; 18 g
Unit count	10 Count

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