POPSOCKETS スライド ストレッチ 深いペリウィンクル

It looks like you're referring to a specific product: the POPSOCKETS Slide Stretch in Deep Periwinkle with square edges (四角い角). Unfortunately, I don't have direct access to product databases or the ability to lookup real-time inventory or prices.
However, I can help with general information about the product. PopSockets are typically used to provide a better grip on smartphones, making it easier to text, take photos, or watch videos. The Slide Stretch feature allows for an adjustable design, and the color "Deep Periwinkle" suggests a soft, calming blue hue.
If you're looking to purchase this item or get more details, I recommend checking popular retail websites or the official PopSockets website. Let me know if you need more specific information!