White zirconia is usually shinier than white topaz due to its high refractive index.

The cost of 10 feet of PVC pipe can vary significantly depending on factors like diameter, thickness (schedule), and location. As a rough estimate, for standard schedule 40 PVC pipe, prices can range from $5 to $20 for 10 feet. Thinner-walled pipes (schedule 20) might be cheaper, while thicker-walled (schedule 80) will be more expensive. For home improvement and minor irrigation projects, a 1/2 inch to 2-inch diameter pipe is often used, falling somewhere within this price range. Prices are subject to change based on supplier pricing adjustments and regional cost variations. For the most current pricing, it's best to check with local hardware stores or online suppliers.

Polypropylene bumpers are highly regarded in the automotive industry due to their remarkable blend of flexibility, resilience, and impact resistance. This material is a type of thermoplastic polymer, which makes it ideal for absorbing energy during a collision, thereby offering better protection to a vehicle's body. Besides safety benefits, polypropylene is also lightweight, which contributes to improved fuel efficiency. Its resistance to chemicals and weather conditions ensures durability and a longer lifespan of the bumper. Furthermore, polypropylene can be recycled, aligning with eco-friendly practices. However, while it offers substantial advantages, the performance and suitability of polypropylene bumpers can depend on specific application requirements and the design of the vehicle. Overall, they are a good choice for those prioritizing safety, sustainability, and cost-effectiveness in their vehicle components.