Maple Sap Tap Spile, 5/16" Ecolo Spout Blue, Maple Syrup Taps (50 Pack) Tough durable nylon construction. Blue color is easier to see against dark background. Use a 5/16" drill hole in your tree and tap until snug. Has a 5/16" ID barbed outlet for tubing. This spout also fits our PVC EZ Sap Sak Holders.