52mm metal Filter Holder
$45.00
Whole dimensions: 8 cm width (3"- 1/16) by 8.3cm (3"-1/4) top to bottom.
Filter holder channel-7 or 8 mm width x 6.5 cm long.
note: Tiffen 52 M 8 ring fits this
58mm NSM metal Filter Holder, screw-type
$18.00
(6.5cm x 6.5cm) 2-1/2" x 2-1/2"