Lowers the seat by 10 mm, I recon is good value. I use a low seat already. Fit is perfect and the material is solid rubber.
https://www.ebay.co.uk/itm/Black-Ri...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649
https://www.ebay.co.uk/itm/Black-Ri...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649