Thank you for viewing! This is a listing for a set of 5 JRC4558s (D, DD, DF, DV, DY)! Tested and working!! 1980s Glossy 4558D 3651 Glossy 4558DD 3189 Glossy 4558DF 8454 Glossy 4558DV 6238 2000s 4558DY 3021A All ICs are used, but have been tested for functionality using an IC checker. I have removed as much solder as possible, but some may remain. How about using these for the creation, modification, or research of distortion or overdrive pedals? Compare the five siblings of the JRC 4558! Shipping will be via Click Post, wrapped in aluminum foil and protected with air padding. Thank you.