Smallrig 3/8"-16 Female to 1/4"-20 Male Tripod Thread Reducer / Adapter Brass NEW (2-pack)
2 precision  Tripod / Monopod Adapters,1/4'' screw attachment type. 3/8'' female thread attachment type.The Mount Adapter From 3/8 Female To 1/4  Male Inch Thread with nylon washer to protect camera base.