UL listed to protect against fire, water and smoke, HoldRite HydroFlame cast-in-place sleeves accommodate penetrants from 1/2" to 12", the widest range in the industry, the company notes. Options include models with a telescoping design of 7 1/2" to 11 3/4", or a safety cap that adjusts from 7 1/4" to 8". www.holdrite.com