Genuine Girling shock absorbers for classic machines. The 325mm (12.9") overall length can be adjusted plus or minus 5mm, and spring preload can be accurately tuned to an individual's body weight or riding style. Girling shocks are supplied with an extensive universal bush kit using modern durable polyurethane bushings, with push-in anodized alloy sleeves. The dual-ended 'C' spanner allows for simple removal of the 110lb spring by unscrewing the bottom lock rings and sleeve.