DuraBright 5mm strands feature a smaller, sleeker design that produces a brighter shine. Thanks to new manufacturing technology, these strands boast of more durable and higher quality construction while maintaining Seasonal Source's color consistency. Provide your customers with the exact look they're looking for. Choose the 4" spacing for a brighter effect due to more lights on the strand. The 6" spacing is a great option to create the same effect at a lower price point.