What's in the box:

10pcs 1/4"-20 to 3/8"-16 Reducer Bushing Convert Screw Adapter for Tripod Monopod Ballhead LED Light Stand DSLR Camera (Gray)

Features:
10pcs 1/4"-20 to 3/8"-16 convert screw adapter.
Allow you to attach 1/4"-16 screw to 3/8"-16 threaded hole.
Made of durable metal.

Specifications:
Package Size: 5 * 1.8 * 1cm / 2 * 0.7 * 0.4"
Package Weight: 16g / 0.6oz

Package List:
10 * 1/4"-20 to 3/8"-16 Reducer Bushing Screw