The black rubber ladder rail covers-panel offer very low-profile 1913 Picatinny rail coverage. The rubbery ladder rail cover material provides a better griping surface for improved weapon control and rail protection. The ladder picatinny rail covers can easily be cut for your custom length needs. Covers up to 30 rail slots. The low-profile ladder rail covers are durable heat resistant and light weight construction perfect for the minimalist. Come one per pack.