This is a Genuine Knott Avonride damper for the 750kg - 1300kg coupling
This Damper fits trailers with Knott-Avonride coupling hitch - Knott: KF13 / KFG13 / KRV13 AND Avonride AV13
Knott / Avonride Part no: 87000709
Overall length is 545mm with the damper body length being 330mm
Fitted to Ifor Williams 1300kg trailers with a Knott - Avonride coupling.
The Ifor Williams part number is P00937