菲律宾采购需求：自行车、自行车零件、三轮车、滑板车、儿童玩具、学步车

I'm looking for heavy-duty bikers helmets that can provide optimal safety and durability for riding under various conditions. Please share details regarding the material quality, safety certifications, and impact resistance of the helmets you offer. I'd also like to know about any additional features, such as ventilation systems or adjustable fit mechanisms, that enhance comfort during long rides. In addition to technical specifications, I'm interested in your production capacity and lead times for bulk orders. Pricing information, including any potential discounts for large quantities, would also be appreciated. If you have any available samples or catalogs, please send those along as well. Looking forward to your detailed response!