About this item KANI 100mm Filter Holder HT100 IV Adapter for attaching the body to the lens with a frame diameter of 3.4 inches (86 mm) Product Name: Magnetic Adapter Ring HT100IV-S86-M95 (Model Number: K24034) External dimensions: φ 4.6 inches (118 mm), Thickness 0.2 inches (5.5 mm); Weight: Approx. 1.3 oz (36 g) Compatible Holders: HT100 IV Filter Holder Cannot be used with conventional filter holders (HT100 III / HT100 II)