<p>20mm Self Healing Injection Ports For Mason Jar Lids</p> <p>■20mm Rubber Stoppers-Vial Rubber Bottle Stoppers Self Healing Injection Ports,Fit 13 mm (0.5118’’) Diameter Opening (100)</p> <p> Rubber Stoppers:3/4” across the top, and 5/16” top to bottom.</p> <p>■Install Instruction</p> <p>(1)use a 7/16 to 1/2 inch Drill Bit and Drill a hole in metal or plastic jar lid and the stoppers pop right in place.</p> <p>(2)Stoppers can be used to make self-healing injection ports in Mason jar lids or medicine bottles.</p> <p>■Mainly used for mushroom growing and liquid culture production. Use with hypodermic needles to inject cultures, therefore never needing to remove the lids on your culture jars.</p> <p>self healing injection ports/ injection ports /injection port self healing ports/ silicon injection port /silicone injection port /vial stoppers /stoppers rubber /vial stopper  /mason jars self healing /silicone ports injection ports/ 1/4 in self healing ports /injection ports /self healing injection ports/ vial stoppers /self healing rubber injection ports /self healing injection port /20ml vial stopper /silicon injection port /self healing injection ports /10ml vial stopper injection port /self-healing injection ports /stoppers rubber /self healing port /self-healing rubber injection ports/ self healing injection ports for mason jar lids</p>