4ms Pedals, working with a glass artist in Austin, TX, makes custom glass knobs for your gear. We can replace any size knob with a custom glass piece, or install them on a pedal we build for you.

• Annealed Boro-silicate (Pyrex) glass, more durable than standard plastic knobs.
• Fits any size shaft: 1/4", 1/8", splined, split, D-shaft, etc
• Custom colors, sparkles, shapes: you name it we can make it!
• Standard sizes also available: medium "swirls", and small "bumps"