Material: Mimosa, Thai Cassia, Almondwood & Burma Padauk. Instrument: We recommend these picks for Acoustic Guitar & Arch-top_Jazz Guitar. Tone: Mimosa is quite hard and will brighten most Acoustic Guitars slightly. Thai Cassia and Burma Padauk are mid hardness and thus frequency neutral where as the softer Timber, Almondwood will have a mellowing affect to the tone. Design: These 4 Timber Tones Guitar Picks are CNC Milled from the very best quality timber then hand sanded and hand polished to give them their amazing shine and smoothness. Timber Tones unique shape is roughly based upon the classic 351 design, however they are 2.4mm thick where you hold them, chamfering down to 0.7mm at the playing tip. Contents: This Tin contains 4 Mixed Timbers suitable for Acoustic Guitar.