I need to fit 3 HDDs and a SSD into this. Will it plug the breathing holes on the HDDs?

works as advertise. I don't think I even used screws . drives slide in just fine. it is used for a 5.25" empty drive bay. And Justin is right I believe. HDD [that use a spinning disk] are close otherwise dust particles may get inside and mess up the drive. So 96% sure they are sealed, not know if they are both ways sealed though. They might have a vent hole, but are only semipermeable, which mean that the flux of air can only move one way. Maybe am wrong but. The initial sentence should answer your question.

What materials are used in the construction of the ICY DOCK MB344SP adapter?

The ICY DOCK MB344SP adapter is made of plastic.

What is the maximum drive height supported by the ICY DOCK 4 x 2.5" HDD / SSD Bracket Mount Kit?

The ICY DOCK 4 x 2.5" HDD / SSD Bracket Mount Kit supports 2.5" HDD / SSD drives with a height of 7mm to 9.5mm.

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ICY DOCK 4 x 2.5" HDD / SSD Bracket Mount Kit Adapter for 5.25” Drive Bay - FLEX-FIT Quattro MB344SP

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Model: Brackets 4BAY

Brackets Versatile
Brackets 4BAY
Brackets 3BAY
Brackets Versatile x2
Bracket ODD

Fits 4 x 2.5" SATA HDD / SSD into a single external 5.25" bay
Compatible with 2.5" HDD / SSD with 7mm to 9.5mm drive height
Tool-less drive installation design with advanced drive stabilizer system
Compatible with any standard external 5.25" bay
Open frame design for maximum passive cooling
Option to be used as a stackable drive organizing rack

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idok4x 2.5" dd/ssdrketmountkitdpterfor 5.25 drive-flex-fitquttrom344sp

Best Seller Ranking	#19 in HDD / SSD Accessories

Model
Brand	ICY DOCK
Model	MB344SP
Color	Black

Details
Conversion Tray	1 x 5.25" Drive to 4 x 2.5" Bay
Mobile Rack Drives Support	Multi 2.5" Drives to 5.25" Bay
Protection Case	Multiple Drives
Specifications	Drive Fit: 4 x 2.5” IDE/SATA HDD & SSD (7-9.5mm) Device Fit: 1 x 5.25" half height device bay Material: Plastic

Features
Features	Fits 4 x 2.5” SATA HDD / SSD into a single 5.25” drive bay Compatible with 2.5” HDD / SSD with 7mm to 9.5mm drive height Tool-less drive installation design with advanced drive stabilizer system Compatible with any standard external 5.25” bay Open frame design for maximum passive cooling Can be used as a stackable drive organizing rack
Package Contents	Device, User Manual, Screws

Additional Information
First Listed on Newegg	March 01, 2026

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Return for refund within: 30 days
Return for replacement within: 30 days
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ICY DOCK 4 x 2.5" HDD / SSD Bracket Mount Kit Adapter for 5.25” Drive Bay - FLEX-FIT Quattro MB344SP

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Item#: 9SIBW8HKT90888

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ICY DOCK 4 x 2.5" HDD / SSD Bracket Mount Kit Adapter for 5.25” Drive Bay - FLEX-FIT Quattro MB344SP

Learn more about the ICY DOCK MB344SP

Customer Reviews of the ICY DOCK MB344SP

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info