For HUION Pen Nib for Digital Pen PW500 PW507. Quick installation and easy removal offer maximum convenience. Replacement nibs provide smooth writing performance and are easy to use. Compatible with the following drawing tablets: HUION Q620M, HS611, Q11K V2, WH1409 V2, G10S, G920S. Compatible with the following drawing monitors: HUION Kamvas 16 (GS1561), Kamvas 20, Kamvas Pro 16/12/13, Kamvas Pro 20 (GT-192), Kamvas Pro 20 2019, Kamvas Pro 22 (GT-221), Kamvas Pro 22 2019, GT-191 V2. What's in the box: 10 pieces of pen nibs. Each pack includes 10 replacement nibs that fit perfectly and deliver a smooth writing experience. Durable and long-lasting. Nib Length: 18.1mm Color: Black Material: Acrylonitrile Butadiene Styrene (ABS) Package Contents: 10 x Pen Nibs Note: Only the items listed above are included. Other products are not included. Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.