Adorama has the Polar Pro LiteChaser Pro for Iphone 11 Pro for $39.99 and the Iphone 11 version is $59.99. Shipping is free.
The iPhone 11 Pro's camera system is changing the game in mobile content creation. Maximize your creative experience and push the boundaries of what a mobile phone can accomplish by controlling unwanted light before it enters your lens with our mobile-optimized Variable ND and Circular Polarizer. The complete creative system is built specifically for mobile filmmakers and photographers to deliver shots never before possible on mobile devices.
Polar Pro LiteChaser Pro for Iphone 11 Pro [adorama.com]
Polar Pro LiteChaser Pro Visionary Kit for iPhone 11 [adorama.com]