BH-45 ELS bass bow holder P904100 Pirastro peg pasta 20VC-VL Viol varnish cleaner SPD-3135 Boston polishing cloth for string instruments 31x35cm PW-FBC D'Addario Planet Waves hydrate fingerboard conditioner PW-SIH-01 D'Addario Planet Waves small instrument humidifier SN-500 Super Nikco polish