6 x Romford Steel Worm & Brass Gear Sets 30:1 40:1 50:1 For 1/8" Axles -Pls Read

6 x Romford Steel Worm & Brass Gear Sets. All gears are to fit 1/8" axles. 2 x 30:1 both originally for 3/32" motor shafts but one has a brass bush fitted to make it 2mm. 3 x 40:1 one 3/32", one 1.5mm and the last has a bush to make it 2mm.