ZWO Filter Masks

$9.15 ~~$15~~ In stock

Category: Astrophotography Accessories

Product Description

ZWO filter masks are used for ZWO filter wheels.

Filter Mask-1 Filter Mask-2

Please use the M2 screws and masks to fix the filters:

⚫ Remove the screws securing the back cover and remove the back cover

⚫ Place filters onto the filter positions.

⚫ Use the included M2 screws with masks to secure the filters in place.

⚫ Replace the back cover and tighten the screws.

Specification Diagram

EFW-7 36masks drawing EFW-8 31 masks drawing EFWmini masks drawing

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When it ships

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Grace ★★★★★ Oct 21, 2026

The included M2 screws threaded cleanly into the wheel without any wobble, and the mask fit snugly over the filter. I’ve already installed three filters with zero light leaks, and the whole process took under ten minutes.

Lucy Q. ★★★★★ Oct 20, 2026

Adhered the M2 screws perfectly and the filter wheel back cover snapped right back on after I placed the masks—no wobble at all. A neat little kit that saved me from having to guess at alignment.

Grace Y. ★★★★★ Oct 19, 2026

Finally got my filters properly seated in the wheel after using these masks and the included M2 screws. The back cover removal was straightforward with the provided instructions, and now everything locks in tight with no wobble.