Ballard Non-Bolus Extension Set BLD012112 Our Low Price:$11.36 In Basket: None With 2 port "Y" and clamp. For use with MIC–KEY Low Profile Gastrostomy Tubes. Features SECUR–LOK 'key' connection mechanism, clear tubing, medication port on non–bolus extension sets, individually packaged extension sets, tubing clamp. Non–sterile.