304 316L Stainless Steel Compression Fitting Ferrule Sleeve Tube OD 3 4 6 8 10 12 14 16 1/8'' 1/4'' 3/8'' 1/2'' Double FerrulesHome Improvement > Plumbing$2.38 (≈ CA$3.33)$2.80In stockSold by AliExpress WWTo Store