The three-hole butterfly clip design breaks through the traditional style and enhances the use limit of the butterfly clip. Made of aluminum alloy hollow. All-aluminum alloy hard thickened oxidized surface treatment, more scratch resistant; 304 stainless steel screw spring; wide and handle, more convenient and easy to rotate, does not hurt the hand. The diving clamp mount for Diameter 25mm ball compatible with arm like ULCS, Ikelite, INON, SEA&SEA. Material: Aluminum alloy colour: blue Package Contents: 2 x diving clamp mount Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. The diving clamp mount for Diameter 25mm ball compatible with arm like ULCS, Ikelite, INON, SEA&SEA. The three-hole butterfly clip design breaks through the traditional style and enhances the use limit of the butterfly clip. Made of aluminum alloy hollow. All-aluminum alloy hard thickened oxidized treatment, more scratch ; 304 stainless steel screw spring; wide and large handle, more convenient and easy to rotate, does not hurt the hand.