Disc spring of clutch 1,5 mm (MZA) - Simson S51, S53, SR50 Note.: The disc spring is 1,5 mm thick. for engine types M500 Can be used for: Simson S51, S53, S70, S83, SC-050, SD 50, Sperber-BR, SR50, TS050, KR51/2, MS The product of the MZA, which is the exclusive holder of the SIMSON brand. GPSR Contact: MZA Meyer–Zweiradtechnik GmbH, Baunsbergstr. 60-62, 34131, Kassel, Germany, gpsr@mza.de