Spectra SG vs Medela Freestyle Spare Parts Kit Comparison
By Healthy Horizons Breastfeeding Centers, Inc. | Published: 2026-10-26
Category: Comparisons
Deciding between the Spectra SG Premium Accessory Kit and the Medela Freestyle Spare Parts Kit? This comparison breaks down the key differences in compatibility, included parts, and sizing options.
Quick answer
Choose the Spectra SG Premium Accessory Kit if you need a complete single-pumping set with multiple flange sizes; choose the Medela Freestyle Spare Parts Kit if you want extra breast shield connectors specifically for your Medela Freestyle pump.
What each kit includes
Both kits replace parts that wear out over time, but they serve different pump models and come with different components. The Spectra SG Premium Accessory Kit is designed as a complete replacement set for Spectra pumps, including a flange, duckbill valve, backflow protector, tubing, and a bottle. The Medela Freestyle Spare Parts Kit focuses on providing two extra sets of breast shield connectors for the Medela Freestyle Breastpump.
Compatibility and sizing
Compatibility is the main deciding factor. The Medela kit is tested and approved for the Medela Freestyle pump only, and using non-Medela parts can affect pump performance. The Spectra kit is available in three flange sizes (20mm, 24mm, 28mm) so you can choose the best fit, but it only works with Spectra pumps. Neither kit is cross-compatible with the other brand.
Trade-offs at a glance
- Spectra SG Premium Accessory Kit: Complete single-pumping replacement set with flange, valve, backflow protector, tubing, and bottle. Choose from three flange sizes. Best if you need a full set for a Spectra pump and want size options.
- Medela Freestyle Spare Parts Kit: Two extra sets of breast shield connectors specifically for the Medela Freestyle pump. Engineered for optimal performance with that pump. Best if you already have a Medela Freestyle pump and just need spare connectors.
- Cross-brand compatibility: These kits are not interchangeable. Using Spectra parts on a Medela pump (or vice versa) may compromise fit and suction. Always select parts designed for your pump brand to maintain performance.
Product facts at a glance
- Medela Freestyle Spare Parts Kit: Medela spare parts are engineered, tested and approved to work specifically with your Medela Breast Pump. Using non-Medela parts may reduce suction performance or cause fit issues, so this kit ensures reliable operation with your Freestyle pump.
Medela Freestyle Spare Parts Kit - Spectra® SG Premium Breast Pump Accessory Kit: Available in 20mm, 24mm, or 28mm flange sizes, this kit includes everything needed for single pumping. You can select the correct flange size for comfort and efficiency, and the all-in-one set simplifies replacement.
Spectra® SG Premium Breast Pump Accessory Kit
Which kit fits your needs?
Best for
- Spectra pump owners who want a complete replacement kit with adjustable flange size
- Moms who prefer an all-in-one set for single pumping
Not for
- Medela Freestyle pump owners
- Anyone needing cross-brand compatibility
