Rock-Tips – Liquid Callus Formula – For Guitar, Bass, and Other Stringed Instruments – 4.0 mL sold2025 the dual-shell design provides improved

the dual-shell design provides improved durability and extra protection in the rear

with or without polish Pregnancy Safe and adheres to 7 Free Promise (Formaldehyde

No stimulation to skin

more to come in the future

are made of soft Felt Blend

Rock-Tips – Liquid Callus Formula – For Guitar, Bass, and Other Stringed Instruments – 4.0 mL sold2025 the dual-shell design provides improvedRock Tips Liquid Callus Formula For Guitar, Bass, and Other Stringed Instruments 4. 0 mL Rock Tips Liquid Callus Formula is based around a medical adhesive, which is designed specifically for use on human skin. With additional polymers added for flexibility and strength, our proprietary formula acts and feels like a hardened layer of skin, with the toughness and flexibility of a real callus. With Rock Tips, you can play your instruments longer without