"Features: 1.Suitable for beginners,plastic material 2.Specially designed for replacing your guitar effects damaged or old parts 3.Fit for Electric Guitar Effect Pedals 4.Footswitch toppers are plastic bumpers for footswitch of guitar effect pedals. Specifications: Material:Plastic Size: 2.44x1.2cm/0.96x0.47 inch(Outer Dia x W) 2.1x0.96cm/0.82x0.37 inch(Inner Dia x W) Weight:36g Package include: 10x Electric Guitar Effect Pedal Knob Cap "