1pcs Ss 304 Stainless Steel Pipe Fittings 1/4" 3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2" Male To Male Threaded Water Connection Adapter - Pipe Fittings - AliExpress
3/4" 3-Way Side Outlet Elbow, Home TZH Cast Malleable Iron 3 Way Corner Pipe Fittings for Industrial vintage style DIY Project/Furniture/Shelving Decoration (10, 3/4") - Amazon.com
Stainless Steel Pipe Fittings 1/8 Inch to ¾ Inch
Hajoca™ 3/4" Steel Nipple | Adaptor - Pipe Fitting - Blue Dog Blasting
Amazon.com: 3/4 Inch Pipe Assortment, Malleable Threaded Pipe Nipples,Steel Pipe Fittings Great For All Your DIY Vintage Shelving Projects, Black (Includes 6 Of Each size, 1-6 Inches 66 Pieces in total) : Everything Else