TP-LINK SM321B WDM SPF Module WDM Bi-Directional SFP Module(LS)

TP-LINK SM321B WDM SPF Module WDM Bi-Directional SFP Module(LS)

Marsoni

M251S

$34.99

Get it in 3 business days with 1 day shipping. Friday, May 29

TP-LINK SM321B WDM SPF Module WDM Bi-Directional SFP Module(LS)WDM Bi Directional SFP Module Supports WDM Bi Directional technology, using a single strand of fiber, cost saving

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
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The product is great and is OEM+ in quality. This has to be the easiest cabin air filter I have ever changed. The replacement is super simple. Take off the glove box by pressing in (check for Youtube videos), remove and take the plastic tray out, remove the old filter, and install the new one into the plastic tray, making note to match the direction of the arrows. Reinstall and you are done. Replace once a year.

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Reviewed in the United States on August 9, 2024

Verified Purchase

Dave K

Belleville, US

★★★★★ 5

The best you can get!

I use Purolator filters exclusively. Top quality filter from a company that specializes in filters.. I use them everywhere a filter is needed. Never a failure and top quality filter media.

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Reviewed in the United States on November 8, 2025

Verified Purchase

a g

Lowell, US

★★★★★ 5

Clean air

Perfect fit for my 2023 Toyota highlander hybrid.

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Reviewed in the United States on July 30, 2025

Verified Purchase

Ellie H.

Lexington, US

★★★★★ 5

works as advertised

works as advertised

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Reviewed in the United States on April 28, 2025

Verified Purchase

WhatWhoMe?

Lowell, US

★★★★★ 4

Arrow is AIRFLOW direction, not UP install direction

Arrow is AIRFLOW direction, not UP direction. So installation direction might mean arrow of your Purolator filter should be down (true for glove box installs) even if arrow on old filter is up (if it was an UP indication). I wish they mentioned this in product listing, on box, or on side of filter like most brands. Luckily, telephone customer service was super responsive. Otherwise, product is correct size, appears sturdily made.

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Reviewed in the United States on May 30, 2025