Descriptions Add some versatility to your Micro with the new Micro springs! The Micro Grey Spring tension ranges from 7.5 LBS to 40 LBS when fully extended. It is heavier than a black spring, yet lighter than a red spring, making it the perfect in between tension to use alone or with other springs.Important Notes:This item will ship within 5 business days from ordering.The Grey Spring is sold individually, so be sure to order two if you would like a pair.The Grey Spring is not compatible with the first version of the Micro, the Micro V1.We are