Bent Neck Double Honeycomb Perc RigBent Neck Double Honeycomb Perc Rig UK Coming from our very own EDIT UK Collection, this bent neck double honeycomb perc rig features double honeycomb percolators. Equipped with a female 18. 5mm ground joint, this glass piece includes a male to male adapter, glass concentrate nail, and a female vapour dome. Bent Neck Double Honeycomb Perc Rig Features UK Stacked Double Honeycomb Percs 4mm Borosilicate Glass Female 18. 5mm Joint Size Includes Vapour