Are they compatible with the sboly sonic tooth brushes?

Yes, they are compatible with the sboly sonic tooth brushes, similar to model 507.

Is it fit to aqua sonic ?

NO, they aren't fit to AquaSonic.

Will these fit kipozi sonic toothbrush model ki-917?

Yes, they will fit. Thanks for your question.

Can you please tell me how I can purchase replacement brush heads that fit model 921?

The replacement brushes are on Amazon! Just type in for replacement brush heads for toothbrush model you have

YUNCHI Electric Toothbrush Replacement Heads 5 Pack Compatible with Fairywill FW-507/508/551/917/959, for FW-D1/FW-D3/FW-D7/FW-D8, for Fairywill Toothbrush Refills - Black

Product ID: 147021094

Details

Brand
YUNCHI
Color
Black
Size
1 count (Pack
Material
Nylon
Age Range (Description)
Kid

⏳3-month replacement

🦷DuPont bristles

🪥5 pack

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2186 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
YUNCHI
Color
Black
Size
1 count (Pack

Description

🖤 Elevate Your Oral Care Game!

TRENDY DESIGN - Unique 'W' shape for optimal plaque removal.
ADA RECOMMENDED - Stay on track with 3-month replacement reminders.
GENTLE YET EFFECTIVE - Soft DuPont nylon bristles for a safe clean.
TRANSFORM YOUR SMILE - Experience 100% more stain removal than manual brushing!
COMPATIBLE CONVENIENCE - Fits multiple Fairywill models effortlessly.

The YUNCHI Electric Toothbrush Replacement Heads come in a convenient 5-pack, designed to fit various Fairywill models. Featuring soft DuPont nylon bristles and a trendy 'W' shape, these heads effectively remove plaque and stains while being gentle on your gums. Recommended by the American Dental Association for replacement every three months, they ensure optimal oral health.

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