印度采购需求：定位销、凹槽定位销、短涂漆定位销、螺旋定位销、染色定位销、木定位销

I'm looking for a supplier for dowels with specific diameter sizes ranging from 6mm to 18mm, all at a length of 6 inches. We require a monthly quantity of 500,000 pieces for each size, with a tolerance of ±0.1mm to ±0.2mm in both diameter and length. The dowels must be made from cost-effective wood, free of cracks and bends, and fully dried. Please provide your best pricing for these specifications at your earliest convenience.