This is a 3mm thick acrylic pickguard for the YAMAHA BB series (4-string) bass. Made from acrylic cast sheet, it is more durable than the cheaper acrylic extruded sheet. As this is a handmade product, there may be minor scratches or individual differences in the finish. Also, although the fit has been confirmed on our BB234, adjustments (modifications) to the screw hole positions may be necessary depending on the individual instrument. Please be aware of this.