How large are 4" filter sock holes?

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Trever

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Are they 4" diameter?

I'm having a glass guy make my baffles and he'll drill the hole for a filter sock in one of the panes. When I measure the diameter on my filter socks, it seems like 4" might be a hair large.
 

fuelman

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Are they 4" diameter?

I'm having a glass guy make my baffles and he'll drill the hole for a filter sock in one of the panes. When I measure the diameter on my filter socks, it seems like 4" might be a hair large.
Looks like 95mm should be spot on.
IMG_20210319_141519224.jpg
 

jradishness

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I had my glass guy cut it 4” and it was too big. If the socks stayed centered, they’d hold, but if it slid sideways at all, it would fall through. I had to run a bead of silicone on the inside of the hole to hold the socks snug and centered.
 
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Trever

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I did a new search with the information provided above by responders and found this posting on another fish board:

Found drawing on Marine Depot where filter sock holder was 3.75" or 95mm to hold 4" filter sock.
 

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