Shock resistant tool steel is the answer

Stand height : 420 mm

and a thinner piston rod allowing for improved dynamic behavior

ART 4075 (16mm version)

For wheels up to 17"

KimpexHD - Stator (SF-010-000503) K-Type-Fuel Pumps Rebuild Shock resistant tool steel isDirect replacement to your original unit Plug and play, direct fit, easy installation Highest grade lamination materials Highest grade copper windings, resistant to 200 degrees Celsius Connector included Rubber grommet included All products shipped are tested Note: Battery condition is extremely important. No stator can work correctly with a bad or weak battery. Always fully charge your battery before performing any charging system tests or replacing