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3M Imperial Hookit Fairing Longboard Sheets 4-1/2 inches wide x 30 inches long : I understand ea means "each", but what does "sl" mean? I'm buying the 30" flexible and rigid 3M sanding boards, and need 36 and 100 grit hookit

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I am fairly certain that "sl" means "sleeve." It is a 10 pack of the sheets in a 4 sided cardboard sleeve. I seem to remember trying to figure out the same thing when I bought them, and did the math and figured it must be 10 of them for ~$65.They're awesome, by the way. We finished our entire fiberglass airplane with them. They last a long time, cut really well, and don't seem to load up.

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The hookit sanding sheets are packaged in a paper sleeve. There are 10 sheets per sleeve. It's my experience that the sheets are very tough. SL stands for sleeve, I think.They are sold per sleeve.I bought both a flexible and a rigid board too, but mainly use the rigid board.

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