WDERAIR
2-Pack 40mm x 20mm 4-Pin PWM PC Cooling Fan, 12V Dual Ball Bearing High Speed for Computer Case, CPU Cooler, 3D Printer, 1U Server, NAS, NVR
*Price sourced from Amazon.com. Last updated 2026-05-26. Price and availability subject to change.
Bottom line: The 2-Pack 40mm x 20mm 4-Pin PWM PC Cooling Fan, 12V Dual Ball Bearing High Speed for Computer Case, CPU Cooler, 3D Printer, 1U Server, NAS, NVR is a solid pick with broad community endorsement in the cpu coolers & fans category, priced around $15.99, rated 4.4★ across 35 verified Amazon reviews. A solid choice — worth comparing against one or two close alternatives first.
SpecPicks Verdict
SpecPicks classifies 2-Pack 40mm x 20mm 4-Pin PWM PC Cooling Fan, 12V Dual Ball Bearing… as a solid pick with broad community endorsement in the cpu coolers & fans category, based on 35 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. WDERAIR's positioning sits comfortably above the category median. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for cpu coolers & fans of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Solid 4.4★ customer rating
- ✓ Backed by WDERAIR's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Limited review volume so far — fewer data points on long-term reliability
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- 【Small 40mm Fan】40 x 40 x 20 mm (1.57 x 1.57 x 0.79 inches) | Rated Voltage: 12V | Rated Current: 0.05 A | Power: 0.4 W | Speed: 5000 RPM | AIR Pressure: 0.11 In H2O | Airflow: 5.52 CFM | Noise: 22 dBA | Connecter: 4Pin | Bearing: Dual Ball
- 【High CFM Computer Fan】4PIN; (+): Red Wire ; (-): Black Wire. FG function：Yellow Wire; PWM: Blue Wire. High air flow to enhance cooling performance
- 【DC Brushless Fan 12V】Good for computer case, radiator and cpu heatsink cooling, server cabinet, rackmount case, refrigerator exhaust, 3d Printer enclosure, project ventilation, PC chassis and electronic equipment
- 【Service & Support】Please feel free to inquire if you have any problems using the product or need technical support.We will respond as soon as possible.
Full Specifications
| Brand | WDERAIR |
|---|---|
| Model | 4020B12V4P |
| Voltage | 12 Volts |
| Material | Plastic |
| Dimensions | 40 x 40 x 20 mm |
| Noise Level | 22 Decibels |
| Part Number | 4020B12V4P |
| Compatibility | PC |
| Material Type | Plastic |
| Cooling Method | fan |
| Number of Items | 2 |
| Air Flow Capacity | 5.52 Cubic Feet Per Minute |
| Compatible Devices | Desktop, Radiator |
| Power Connector Type | 4-Pin |
Ready to buy?
2-Pack 40mm x 20mm 4-Pin PWM PC Cooling Fan, 12V Dual Ball Bearing High Speed for Computer Case, CPU Cooler, 3D Printer, 1U Server, NAS, NVR is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-26. Price and availability subject to change.
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