The Wedgle Tip is used with self-sealing WedgeCheks which keeps the chemical in the tree when the tip is withdrawn. The Portle Tip has ports along the length of the tip which inject chemical at multiple locations. It is dependent on the tree’s translocation to move the chemical out of the injection area. Therefore, it is very useful for injecting difficult-to-to-treat hardwoods or when making large-volume injections (such as for Dutch Elm disease or Oak Wilt) or late season injections when most trees are harder to penetrate. For more information on the various tips available, click here.