Four – Olympus IPLEX FX Optical Adapters, 6.2mm (IV8635X1); AT120D/NF-IV86X1, AT120S-IV86X1, AT60D/60D-IV86X1, AT60S/60S-IV86X1 in plastic case. Two of the adapters, 120DN and 120S, have the channel for a hook assembly or retrieval tool. 60/60D and 60/60S are stereo measurement adapters. All adapters are clean with no visible signs of usage.