Wire Shelf Plastic Clips / Plastic Sleeves for Metal Shelving. Available sizes: 3/4", 1", 1.5" These black plastic slip-sleeves are what fasten your shelves to the poles. 8 pairs (16 half pieces) Slip-Sleeves . 8 pairs is enough slip-sleeves for two shelves. You dont need to replace these Wire Shelf Plastic Clips / Plastic Sleeves, however, when braking the shelf apart some of these clips tends to get lost and thus a replacement is needed. Make sure to specify the right size for your shelf when ordering.