Here are four LPL enlarger lens boards all with 42mm unthreaded holes. These lens boards fit the 4x5 LPL enlarger and perhaps other LPL enlargers. Note: You will need a retaining ring for your lens to mount it on an unthreaded lens board. All are is good condition. $25 each, plus $9.00 shipping. Or buy all four for $85, plus $9.00 shipping