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What You Need to Know About 3x3 J-Cups by Fringe Sport Need an additional set of J-Cups for your 3"x3" rig or squat rack, like the squat rack or rig? We've got you covered, with free shipping of course! These J-Cups are built from heavy-duty steel, precision bent and welded. Plus, they're lined with a UHMW plastic to protect the finish on your bar. Finally, they're built to fit any 3"x3" rig in the market. Pin Size: 1" W Full year satisfaction guarantee. 1,000 lb weight capacity (pair) Sold by the pair (one left/ one right j-cup) Fits most other racks on the market that are built of 3"x3" steel with 1" holes, including all Fringe Sport squat racks and rigs The J-Cups are designed and built overseas for our 3x3 rigs and squat racks, but they will fit many other brands of rig- or you can even build your own rig and use these J-Cups.