This vintage memory expansion card is designed for use with Apple II and is fully functional with a capacity of 1MB. The card bears the iconic 670-0024 model number and is commonly referred to as the "slinky". It is a great addition to your vintage computing collection with its compatibility and reliable performance. The card has been thoroughly tested and found to be in excellent working condition. It is a perfect fit for those who love to remember and cherish the classics of the early computing era.