Coltri MCH3-MCH6 compressor first stage piston kit. Described by Coltri as "1ST STAGE PISTON KIT [KIT PISTONE 1°STADIO]". For additional information on this kit, see page 8 of either Parts List located under the User Manuals tab.
Nuvair is an Authorized Coltri Distributor
Nuvair sells only genuine parts and equipment manufactured by Coltri Compressors. Do not be fooled by cheap aftermarket copies of original Coltri equipment. Items labeled “replacement,” “OEM equivalent,” “compatible,” or “alternative” are not manufactured by Aerotenica Coltri S.p.a.
Some Coltri parts are not available for purchase online. To ensure this genuine Coltri part fits your compressor model/version, please contact the Nuvair sales team for ordering assistance.