About this 3D model

We recently bought a used cart with adjustable shelves made from 1.5 inch diameter tubing. Unfortunately, some of the split sleeves were broken and replacements were not readily available. When installed, you can barely see the upper and lower parts of the sleeves as seen in the photo (sleeves are red). The part was redesigned to allow 3d printing without overhangs. Just install a pair of sleeves making sure they are inserted into the grooves. There is an "up" arrow indicating the proper orientation.