Referred to as 1/4" drip irrigation coupling a 1/4" barb connector, or 1/4" transfer barb.
1/4" Drip irrigation tubing connectors can be used several ways.
Inserted into your main line and then attach 1/4" tubing or soaker hose or dripperline.
Use to attach 1/4" soaker hose and 1/4" poly tubing together (also referred to as spaghetti line).
1/4" connectors are used to connect pieces of 1/4" micro tubing or soaker hose to a main line or to extend a dripper or micro sprayer away from the main line with micro tubing.