This is the neck of a YAMAHA RGX-512J. I received this as a gift, so I don't know the usage history or detailed specifications. The inscription "RGX-512J" is on the tip. Also, the inscription "520J" can be seen on the base, but I am unsure of the details, so please check the photos. There are small scratches and scuffs due to aging and use, but no noticeable large cracks. This is an auction for the neck only. I cannot guarantee the possibility of adjustment or installation, so please consider it as a current item/parts. The photos take precedence regarding the condition and markings. If you have any questions, please comment before purchasing. Shipping may be changed from Rakuraku to Yu-Yu.