The 118 EXP is a CSA-approved explosion-proof vacuum cleaner that meets requirements for use in Class I, Group D, and Class II, Groups E*, F, and G environments. The vacuum features 6.6 or 13.2 gallon collection capacity. The 118 EXP is designed for collection of dry materials only. (Another version of the machine, the 118 EXPW model, is designed for wet/dry material collection.) Constructed of 304 stainless steel, the 118 EXP features optional HEPA or ULPA filtration.