Arlen Ness AN-18-064 Rain Sock (Pre-Filter) for 65 Degree & 90 Degree Velocity Sucker Air Filter KitsDescription for Arlen Ness Velocity 65 Degree Pre Filter Rain Sock 18 064 Fits the Velocity 65 Degree air cleaner Helps prevent moisture from reaching filter element Included Items: (1) Black pre filter rain sock No instructions Product Specs for Arlen Ness Velocity 65 Degree Pre Filter Rain Sock 18 064 Part #: AN 18 064 Mfg #: 18 064 Color Black Type Sock Filter Units Each Weight 0. 05 lbs