Tinksky 100pcs Universal Plastic Guitar Picks Plectrums for Acoustic and Electric Guitar (Random Color) 100 pieces of the plastic guitar picks in one set will be sold together by random color. Material: durable hard ABS plastic and nylon. Size (L*W): about 3*2.5cm. Thickness: about 0.58-0.86mm. Made of good quality plastic material and provides great tone. Universal and Suitable for both acoustic and electric guitars.