Smallrig 1/4"-20 to 3/8"-16 Convert Screw Adapter Camera Fixing Screw Thread Adapter Pack - 1073 1 pc of 3/8"-16 Male to 1/4"-20 Female Tripod Thread. 1 pc of 3/8"-16 Female to 1/4"-20 Male Convert Screw. Standard 1/4"-20 and 3/8"-16. Weight 18g (0.63oz) Made of copper.