Metal 25mm x .5 pitch lens lock ring (jam nut) to secure lenses with 25mm diameter mounting thread to unthreaded enlarger or camera lensboards.
25mm to 39mm Leica thread adapter for mounting Schneider lenses with 25mm thread on 39mm lensboards.
Enlarging Lens Extension Tube for LPL, Omega/LPL, & Saunders/LPL 4x5 enlargers
