... cables, hoses,pipes and tubing. Technical Requirement1. Exterior surface: Smoothly, No starving crack scuff and burr, No ... patency foaming and uneven, No inclusion.2. Surface color: Black, Non-blushing, No obviously off-color. ... of the ProductsInner diameter: 8-160mmTypes: Bright Flat Surface, Bright Cambered Surface; Matt Flat Surface, Matt Cambered Surface.Color: Black, Gray, Red, Yellow, ...