This carb cap & tether combo is an official replacement part for the Pulsar APX eRig . The carb cap is made from quality borosilicate glass with a dual-directional airflow to create rapid spinning action within the rig's atomizer chamber. It's held securely in place by the silicone tether, which attaches to the glass atomizer collar. Hand blown borosilicate glass Includes tether to secure it to the atomizer Replacement part for the Pulsar APX eRig