JR Products Gas Spring - 20" / 150 Lbs - GSNI-2300-150JR Products GSNI 2300 150 Multi Purpose Lift Support; Use To Open Or Hold Open The Door Or Platform; Gas Type; Plastic Socket End; 11. 41 Inch Compressed Length; 20 Inch Extended Length; 150 Pound Lifting Capacity Used For: Open Hold Open The Door Platform Extended Length (IN): 20 Inch Compressed Length (IN): 11. 41 Inch Upper Mounting Style: Socket Lower Mounting Style: Socket Load Capacity (LB): 150 Pound Quantity: Single Travel Length (IN): 8 Inch