This 4-Way Tandem Solenoid Valve is a genuine part manufactured by Stellar Industries and is compatible with numerous Stellar crane models manufactured after 2004, including the 5520, 6620, 7621, 9620, 10620, and 12621 series cranes. This specific valve is a direct replacement for the older Stellar part# 25371. Compatible Stellar Crane Models*: 55 Series (5520, 5521), 66 Series (6620, 6628), 76 Series (7621, 7628, 7630), 96 Series (9620, 9621, 9628, 9630), 106 Series (10620, 10621, 10628, 10630), 126 Series (12621, 12628, 12630) *All the listed models are compatible with this part, provided they were manufactured in 2004 or later.