The 40/50/60 models are available only in a 20 inch shaft version which weighs 240 pounds. The 75/90 models are available in both a 20 inch shaft version which weighs 320 pounds and a 25 inch shaft version which weighs 335 pounds. The 200 through 250 models are available in a 20 inch shaft version which weighs 516 pounds, a 25 inch shaft version which weighs 524 pounds and a 30 inch shaft version which weighs 530 pounds.