Check the listing for details. PISTON KIT FITS ECHO PB250, PB251, PB250LN, PB252, PART # P021017410, NEW. Condition: New. Listed at 29.95 USD. PISTON KIT FITS ECHO PB250, PB251, PB250LN, PB252, PART # P021017410, NEW, REPLACES PART #P021017410, PISTON KIT IS 34MM DIAMETER. THIS IS A HIGH QUALITY PISTON KIT, NOT MADE IN CHINA, WILL FIT THESE MODELS LISTED BELOW Echo ES-250 - Echo Shred 'N' Vac Shredder / Vacuum (SN: P33612001001 - P33612999999) - Engine, Short Block - SB1104 Echo ES-250 - Echo Shred 'N' Vac Shredder / Vacuum (SN: P33711001001 - P33711999999) - Engine, Short Block - SB1104 Echo ES-250 - Echo Shred 'N' Vac Shredder / Vacuum (SN: P33813001001 - P33813999999) - Engine, Short Block - SB1104 Echo ES-250 - Echo Shred 'N' Vac Shredder / Vacuum (SN: P38311001001 - P38311999999) - Engine, Short Block - SB1104 Echo ES-250 - Echo Shred 'N' Vac Shredder / Vacuum (SN: P40412001001 - P40412999999) - Engine, Short Block - SB1104 Echo ES-250 - Echo Shred 'N' Vac Shredder / Vacuum (SN: P40513001001 - P40513999999) - Engine, Short Block - SB1104 Echo ES-250 - Echo Shred 'N' Vac Shredder / Vacuum (SN: P41814001001 - P41814999999) - Engine Echo ES-252 - Echo Shred 'N' Vac Shredder / Vacuum (SN: P39726001001 - P39726999999) - Engine, Short Block - SB1104 Echo ES-252 - Echo Shred 'N' Vac Shredder / Vacuum (SN: P39826001001 - P39826999999) - Engine, Short Block - SB1104 Echo PB-250 - Echo Handheld Blower (SN: P05412001001 - P05412999999) - Engine, Short Block - SB1104 Echo PB-250 - Echo Handheld Blower (SN: P30911001001 - P30911999999) - Engine, Short Block - SB1104 Echo PB-250 - Echo Handheld Blower (SN: P31013001001 - P31013999999) - Engine, Short Block - SB1104 Echo PB-250 - Echo Handheld Blower (SN: P33112001001 - P33112999999) - Engine, Short Block - SB1104 Echo PB-250 - Echo Handheld Blower (SN: P33211001001 - P33211999999) - Engine, Short Block - SB1104 Echo PB-250 - Echo Handheld Blower (SN: P33313001001 - P33313999999) - Engine, Short Block - SB1104 Echo PB-250 - Echo Handheld Blower (SN: P36826001001 - P36826999999) - Engine, Short Block - SB1104 Echo PB-250LN - Echo Handheld Blower (SN: P34712001001 - P34712999999) - Engine, Short Block - SB1104 Echo PB-250LN - Echo Handheld Blower (SN: P34811001001 - P34811999999) - Engine, Short Block - SB1104 Echo PB-250LN - Echo Handheld Blower (SN: P34913001001 - P34913999999) - Engine Echo PB-250LN - Echo Handheld Blower (SN: P38211001001 - P38211999999) - Engine, Short Block - SB1104 Echo PB-250LN - Echo Handheld Blower (SN: P39926001001 - P39926999999) - Engine Echo PB-250LN - Echo Handheld Blower (SN: P40212001001 - P40212999999) - Engine, Short Block - SB1104 Echo PB-250LN - Echo Handheld Blower (SN: P40313001001 - P40313999999) - EngineEcho PB-250LN - Echo Handheld Blower (SN: P42814001001 - P42814999999) - EngineEcho PB-252 - Echo Handheld Blower (SN: P35620001001 - P35620999999) - Engine, Short Block - SB1104 Echo PB-252 - Echo Handheld Blower (SN: P35720001001 - P35720999999) - Engine, Short Block - SB1104