LEGO 5108 Double-Acting Pneumatic Piston Cylinder 48 mm is a vintage Service Packs set from 1989 valued at $17 for new and sealed sets, up 453% from an original retail price of $2.99. Annual appreciation has averaged 4.67% since release. On the used market, values range from $2 to $2 based on condition.
LEGO 5108-1 Double-Acting Pneumatic Piston Cylinder 48 mm is a Service Packs Technic set released in 1989, containing 1 piece. It includes a yellow double-acting pneumatic cylinder with two inlets (medium/48 mm) and a black top, used in Technic pneumatic systems. Supplied as a replacement or expansion element, it connects to standard Technic pneumatic hoses and valves used in sets from that period.
A new and sealed Double-Acting Pneumatic Piston Cylinder 48 mm is currently valued at around $17, with annual growth of approximately 3%. The average used price is $2 for those in good overall condition. New and sealed listings currently range from $14 to $20. Based on current trends, this set could be valued near $17 within the next year.