Raiders wide receiver Antonio Brown is on the hunt for a helmet of his preferred model that the NFL will let him wear. And he’s offering a memorabilia trade if he can get one.

Brown wrote on Twitter today that if someone will give him a Schutt AiR Advantage helmet that fits him and is less than 10 years old, Brown will trade a signed practice helmet for it.

“I’m looking for a Schutt Air Advantage Adult Large Helmet that was manufactured in 2010 or after. In exchange I will trade a signed practice worn Raiders helmet,” Brown wrote on Twitter.

At issue is the NFL’s rule that players can’t play in helmets more than 10 years old. Brown has been wearing the same helmet throughout his NFL career, and he tried to bring it with him from Pittsburgh and have it re-painted to play in it for the Raiders.