Halo 6.75" RigAngelic The compact Halo rig by Evolution may be only 6. 75 inches tall, but it delivers big flavorful hits that are smooth and cool. Made of thick and sturdy high quality borosilicate glass, this is a robust rig that's supported by a stable round foot. The rig's slightly bent mouthpiece makes it comfortable to use and the showerhead diffuser inside filters and smooths the smoke for gentle, harsh free hits. You can use this 14mm male jointed rig to