Erik Olson: "What is this? How many Primo blocks came with studs like Duplo?"
Arne Nielsen: "Fits PRIMO studs (like 5028 baseplate) at the bottom, DUPLO at the top"

The list below is informational only. Do not contact people and ask them if they want to sell unless they're on the "want to sell" list!

Arne Nielsen (1 copy)   Andrew J. Summersgill, Mr (1 copy)