PA12 nylon powder. Weighs around 7 lbs but with the hollow body it tends to neck dive. Luckily the pickup, switchplate cavities are sealed so I can drill into one and put some gravel in the bottom or something to give it some balance and plug it back up. Wasnt sure if it was gonna be a wall hanger or player so I went cheap on hardware, except tuners. Sounds good though. Twangs like a Tele!!!