Product Info Catalog Plumbing Pipe & Fittings Compression 4PC 3/8" Sleeve/Ins Kit 4PC 3/8" Sleeve/Ins Kit Request a Quote UPC: 52151170057 SKU: 207866 Model Number: 17-0931 4 Piece, 3/8", Hard Nylon Compression Sleeve & Brass Insert Kit, Carded.