Product description 3 Pieces 1/ 4 inch to 3/ 8 inch male threaded screw adapter: This is international standard precision made 1/4"to 3/8" Male to Male Threaded Screw Adapter. The maximum length is 20 mm and the maximum width is 16 mm, Made of metal and silvery plated surface. Standard tripod mounting thread. Suitable for the connecting and converting your dslr configurations from 3/8" female hole to 1/4" male thread.. Very Solid and and durable. Practical to use. Length: 20 mm/0.8in Width: 16 mm/0.6in 3 Pieces 1/ 4 inch to 1/ 4 inch Male To Male Threaded Screw Adapter: This is international standard precision made 1/4" 1/4" Male to 1/4" Male Threaded Screw Adapter. The maximum length is 20 mm and the maximum width is 16 mm, made of metal and silvery plated surface. Standard tripod mounting thread. Suitable for the connection of a variety of 1/4 screw holes for your dslr configurations. Very solid and and durable practical to use Length: 20 mm/0.8in Width: 16 mm/0.6in 6 pieces 1/4 inch female to 3/8 inch male screw adapter Converters: Thread adapter with female 1/4" thread to male 3/8" thread, made of Bronze, solid and durable, compatible to lens plate button heads Height:7mm/0.3in Packing List: 21/ 4 to 1/ 4 Male to Male Screw Adapter(Black) 21/ 4 to 3/ 8 Male to Male Screw Adapter(Black) 21/ 4 to 1/ 4 Male to Male Screw Adapter(Silver) 21/ 4 to 3/ 8 Male to Male Screw Adapter(Silver) 8 1/4 to 3/8 Screw Adapter Converters Manufacturer Contact Information Hengyang, Hunan 421237,CN