Trailer shock sbsorber for independent suspension IS100. Open length 420mm (centre to centre). Closed length 275mm (centre to centre). Bolt hole 9/16 inch. Sold as each. Used on imported camper trailers with independent suspension such as MDC, Black Series, Goldfield, Platinum Campers, T-rex campers, Cub Campers, Austrack, Sterling Campers, Sovereign Campers, Ezytrail Campers ,Star Vision Campers and others.