Use on German grandfather and grandmother movements. Can be used on others. Polished brass finished lyres, plain bobs and rods. #31002 and #31003 have straight rods. All others have twisted decorative rods. Pendulums are shipped in a separate reinforced box for safe delivery. For 94cm Movements. Bob diameter is 270mm (10-5/8"). 35-5/8" overall length. Made in Asia.