World Champion ACER Racing Stainless 4x10x4mm Ball Bearings 10 pieces per order as shown.  These are 4x10mm ball bearings also known as a size MR104 ball bearing. Stainless Steel Balls, HSR inner cage technology and shielded on both sides. Lubricated with lightweight and 100% synthetic American ACER Racing SIN oil for fast and super smooth action. True high precision ABEC 5 rating. 

These are very popular as 4x10mm fishing reel bearings allowing you to cast farther and longer but can be used anywhere a 4x10x4mm bearing is required: 100% stainless construction, no need to disassemble and degrease as they come oiled with the best synthetic oil.

Also available in Ceramic under a different eBay listing.

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