Cokin P Series Filter Holder Adapter Ring (72mm) CP472 B&H Photo
Zomei Square Filter Holder+77mm Adapter Ring for LEE Cokin Z HITECH system 4" | eBay
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 Gradual ND Kit H3HO-25 + Adapter Ring P 77mm - Photospecialist
77mm Metal Adapter Ring +100mm Square Filter Holder Support For Haida Lee Hitech Cokin Z Pro 100x100mm 100x150mm Filters - Camera Filters - AliExpress
Cokin 77mm P Series Adapter Ring for Lens Front Threads Screw In | eBay