The roller chain simplex of type 12B of the brand IWIS known under the reference 12B-1-ECOPLUS-DIN8187-5M-IWIS. It has a pitch 19.05 mm and is to the 9 norm.
The roller chain simplex of type 12B of the brand IWIS known under the reference 12B-1-ELITE-DIN8187-5M-IWIS. It has a pitch 19.05 mm and is to the 9 norm.