Kase K9 Magnetic Adapter Ring - 67mm 6X Cross Aluminum alloy filter ring is

Aluminum alloy filter ring is durable while remaining lightweight

7 Optical Density

Worn out transfer gears add excess strain on your rotation motor and can cause overheating

H&Y Filters Drop-in (95mm) 4x Short Cross Star Filter for RevoRing Swift Drop-in Racks & K-Series Magnetic Holder

the "deadline" is made using a very special method that repeats the trouble of recombining all the threads set during production twice

Kase K9 Magnetic Adapter Ring - 67mm 6X Cross Aluminum alloy filter ring isKase K9 Magnetic Adapter Ring 67mm Key Features 90mm Front Holds 90mm Magnetic Filters 67mm Rear for 67mm Filter Rings The 67mm K9 Magnetic Adapter Ring from Kase features a 67mm rear thread that allows attaching to 67mm filter rings. Attached to a filter ring, it provides a 90mm unthreaded front ring that holds 90mm magnetic filters.