Dear {Recipient},
Many thanks for letting me borrow your {item}. I couldn't have {what you did with it} without it! You're a real lifesaver. I owe you one!
{Your Name}
Dear {Recipient},
Many thanks for letting me borrow your {item}. I couldn't have {what you did with it} without it! You're a real lifesaver. I owe you one!
{Your Name}