Filter—B+W 093 Infrared Pass
Graphs are in nanometers. Visible light is approximately 390 - 650 nm (the human eye can see very weakly into the 700-800nm range). Graphs used by permission of Coastal Optical System.
A great source for filters at competitive prices is B&H Photo. Get filters at B&H Photo.
The B+W 092 filter is a better choice for most infrared work; the 093 cuts off the highly useful 700-800nm band, which eliminates false-color possibilities. Get the B+W 093 infrared filter at B&H Photo.