ROBERTSON 3P20047 RSW140T12120 /A eBallast, Rapid Start, 120V, NPF, for 1 F40T12 (Item sold now as Model RSO140T12120 /A in single quantities as ROBERTSON 3P20162; Available in a 10 ea. Quik-Pak as ROBERTSON 2P20162) Equivalent to: Philips Advance RLCS-140-TP-W,REL1S40SC,GE GECX40-MAX-3W,Universal 445-RS-WS-TC-P Equivalent to: Espen VEC40120MR, Osram QTP2X40T12120RSNSC, MB1x32/120CIRC, Sola ERSFC-132-TPK Equivalent to: Fulham WHCG6127T12RS,Keystone KTEB-140-1-TP-EMI,KTEB-140-1-TP-EMI-WS Save 43% and order the Quik-Pak of 10 individually packaged ROBERTSON units: 2P20047 RSW140T12120/A Two Year Factory Warranty-ONLY if the Amazon Seller is ROBERTSON WORLDWIDE.