QNAP Rail Kit A03 series, max. load 57 kg TS-1673U, TS-1673U-RP, TS-879U-RP, TS-1279U-RP, TS-EC879U-RP, TS-EC1279U-RP, TS-1679U-RP, TS-EC1679U-RP, WB-1200U-RP, WB-1600U-RP, TS-EC880U-RP, TS-EC1280U-RP, TS-EC1680U-RP, REXP-1220U-RP, REXP-1620U-RP, REXP-1220U-RP, TS-EC880U R2, TS-EC1280U R2, TS-EC1680U R2, TVS-EC880U-SAS-RP, TVS-EC1280U-SAS-RP, TVS-EC1580MU-SAS-RP, TVS-EC1680U-SAS-RP, TVS-EC880U-SAS-RP R2, TVS-EC1280U-SAS-RP R2, TVS-EC1580MU-SAS-RP, TVS-EC1680U-SAS-RP R2, TDS-16489U, TES-1885U, TES-3085U, TS-1677XU-RP, TVS-1672XU-RP, TS-1683XU-RP