Material: Lignum Vitae, African Ebony, Macassar Ebony, Malay Ebony, Indian Chestnut, Bloodwood, Purple Heart, Coconut Palm, Mimosa, Ironwood, Palemoon Ebony, Cobra's Saffron, Thai Cassia, Rose Apple, Almondwood, Sugar Maple, Burma Padauk & Thai Sindora. Instrument: We recommend this collection for Acoustic Guitar, Electric Guitar & Arch-top Jazz Guitar. Tone: This Tin contains a selection of Timbers with varying hardness levels, all of which will give slightly different tones. Design: These 18 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 1 of each of the 18 Timber Tones Guitar Picks.