NEW cuckoo clock weights. Made in the Black Forest of Germany. Each weight weighs 320 gram (11.3 ounce). Cast iron. Excellent quality. 5 1/8" long x 1 1/16" wide. This is a very popular weight size used with 30 hour (1 day - the clock is wound on a daily basis) Regula 25 cuckoo clock movements. Will also work with other brands.