156-key keycap set made of PBT plastic, uniform profile. - Model Name: Penguin Belly Slide (PBS) - Black on Black - Number of Keys: 156 keys - Material: PBT plastic - Profile: Uniform profile - Thickness: 1.5mm Thank you for viewing. Although they appear to be shiny in the photos, there is no shine caused by use on the keycaps. Purchased new for around 10,000 yen.