Do I need to wash these before using?

I would. I used the Medela steaming bags that you can get to clean the equipment. I don't steam the bottles any more though, they seemed to crack.

Are these compatible with the Freestyle?

I have the pump in style, but I believe all the accessories can be used between all Medela pumps so you should be fine

Will these fit the Spectra S1?

These will fit the narrow neck flanges (medela and spectra compatible), but not the wide neck flanges that come with the spectra pump. I actually prefer the medela valves over the spectra duckbills, so i use the narrow neck flanges with the spectra pump. There is a long backflow protector you can buy.

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NENESUPPLY

Product ID: 272475193

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Details

Brand
NENESUPPLY
Operation mode
Electric
Special features
Bpa Free Dehp
Material
Bpa Free
Power source
Manual

💧Easy to Sanitize

🔄4 Valves

🧪BPA & DEHP Free

Description

💖 Pump with Confidence: Elevate Your Breastfeeding Journey!

VALUE PACK - Includes 4 valves and 8 membranes for extended use.
USER FRIENDLY - Effortlessly removable from breastshields for quick replacements.
HYGIENIC DESIGN - BPA and DEHP free for peace of mind.
OPTIMAL PERFORMANCE - Experience the same suction power as original Medela parts.
VERSATILE COMPATIBILITY - Seamlessly fits Pump In Style, Symphony, Swing, and more.

NENESUPPLY Membrane Valves are compatible with various Medela breast pumps, offering a reliable and hygienic alternative to original parts. This set includes 4 valves and 8 membranes, all BPA and DEHP free, ensuring safe and effective pumping. Designed for easy sanitization and optimal suction, these parts are perfect for busy moms seeking convenience and performance.

Specifications

Weight	34 g
Units	1 count
Brand	NENESUPPLY

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€ 37.67

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TrustScore 4.5 | 7,300+ reviews