Clamp for Gluing Wolf Resonators Petz Crack clamp cello, set - 5 parts, without rubber Item No. ZN21VC Petz Crack clamp cello, width … Petz Crack clamp cello, set - 5 parts, without rubber (width 480mm, 400mm, 380mm, 340mm, 295mm) × Petz Crack clamp cello, set - 5 parts, without rubber