Cokin "A" Series 58mm Adapter Ring (A458) CA458 B&H Photo Video
Adaptor rings
Zomei Filter Holder + 67mm/72mm/77mm/82mm/86mm Adapter Ring For Cokin Z Lee Tiffen Hitech Singh-ray 4x6" 100x100mm 100x150mm - Camera Filters - AliExpress
Cokin "A" Series 52mm Adapter Ring (A258) CA452 B&H Photo Video
Adapter Rings for P-Series Filter Holders – Cokin Filters
Cokin Universal X-Pro Series Filter Holder Adapter Ring CX499N
Adapter Ring f/ 100mm Filters - Compatible w/ Fotodiox 100mm & Cokin Z-Pro Filter Holder – Fotodiox, Inc. USA
Camera Square Filter Adapter Ring Aluminum Metal Ring Lens Adapter For Cokin P Series Filter Holder 49 52 55 58 62 67 72 77 82mm - Lens Adapter - AliExpress
Cokin Cokin P Series Filter Holder and 67mm P Series BP40067K
COKIN P-SERIES 82MM ADAPTER
Cokin Z472 Adapter ring 72mm for Z series - Foto Erhardt