This is a Genuine Knott Avonride damper for the 1300kg - 2000kg coupling
This Damper fits Trailers and Caravans with a Knott - Avonride coupling hitch Knott KF17 KF20 KFG20 & Avonride AV20
The Knott / Avonride part number 87001109
Overall length of the unit is 545mm and body length of the damper unit only is 330mm
Fitted to Ifor Williams 2000kg trailers with a Knott - Avonride coupling.
Ifor Williams part number P00373