Petz Crack clamp for cello, … Petz Crack clamp set cello - 3 parts, without rubber Item No. ZN22VC Petz Crack clamp set violin/… Petz Crack clamp set for cello - 3 parts, without rubber (width 400mm, 350mm, 310mm) × Petz Crack clamp set cello - 3 parts, without rubber