The Imperial sizes include 1-1/8", 1-1/4", 1-1/2", 1-3/4", 1-7/8", and 2", although not every type (H, HD, HS, HIF) was offered in every size.
Kurkun halkaisijat Imperial eli tuuma mitoituksella ovat 1-1/8", 1-1/4", 1-1/2", 1-3/4", 1-7/8" ja 2", tosin kaikkia tyyppejä ( H, HD, HS, HIF ) ei ollut saatavissa joka kokoa.