Amazon.com : NEEWER Magnetic Step Up Adapter Ring Kit Only Compatible with K&F NEEWER 77mm Magnetic Filters, 58mm-77mm, 62mm-77mm, 67mm-77mm & 72mm-77mm Lens Filter Adapters, NOT for Non Magnetic Filters : Electronics
TAISHER 5PCS 90 Degree Barstock Street Elbow, 1/2 Inch NPT Male Pipe to 1/2 Inch NPT Female Brass Pipe Fitting - - Amazon.com