Which SR Blue or black Fuse

Before Geoffy The Fuse Troll jumps in, remember that SR fuses are not UL or CSA approved. You still need a legitimate fuse to meet electrical safety bureau driven requirements. Otherwise, if there’s an electrical fire due to the equipment with the boutique fuse, your insurance claim will be denied. 

Better be safe than sorry. Spend the extra several hundred dollars on music. 

What a 🍆

I think the aftermarket PC are also not UL listed?

The larger fuse is 32 mm, or 1.25".  Get the Blue.