This is the 1/8" to ¼" adapter from Model Maker. It changes an 1/8" compressor output to a ¼" output. FEATURES: Metal construction Internal 1/8" threads External ¼" threads INCLUDES: One 1/8" to ¼" adapter REQUIRES: A ½" wrench for assembly SPECS: Length: 19mm (.75") COMMENTS: If the 1/8" to 1/8" adapter is needed, use HCAR4106. NNA 1/24/05 ir/jxs