The Sci Directional Air Flow Carb Cap from GEAR Premium® is made of 100% borosilicate glass and includes a carb cap with a flat base and directional air flow that allows you to adjust your air flow on the fly. Feel the GEAR Premium® difference and order one today! Product Features: - 100% borosilicate glass - Easy grip handle - Flat base What's Included: 1 x Sci Directional Air Flow Carb Cap (#G1170)