P-132-P Boston bridge for acoustic guitar P-132-E Boston bridge for acoustic guitar P-136-P Boston bridge for acoustic guitar P-136-E Boston bridge for acoustic guitar P-145-P Boston bridge for acoustic guitar P-145-E Boston bridge for acoustic guitar VENSM-EB Vendramini Selmer/Maccaferri guitar bridge ebony VENSM-RW Vendramini Selmer/Maccaferri guitar bridge rosewood VENSM-BDR Vendramini Selmer/Maccaferri guitar bridge Bois de Rose VENSM-RFM Vendramini Selmer/Maccaferri guitar bridge roasted flamed maple VENSM-RFW Vendramini Selmer/Maccaferri guitar bridge roasted flamed walnut GB2535000 Allparts rosewood bridge and base GB28670RF Allparts acoustic guitar bridge