For training and testing purposes, 20 WedgeCheks are included with each injection unit purchase. One bundle of WedgeCheks, sufficient to make 130 injections, is included with every 120 ml chemical pack. Eight bundles are included with the 1000 ml chemical pack used with our high-volume kit. WedgeCheks are not used with the Portle or Portle Palm Tips. If you have too many WedgeCheks, we offer an exchange program that allows the exchange of one bundle of WedgeCheks for one Portle Tip and two bundles for one Portle Palm Tip. For more information, click here.