I bought a T-Bone SC-450 about 10 years ago (excellent for the low price), and the elastic spring-mounts had stretched to the point that the spider would no longer hold the microphone securely. Considering that it is basically a large elastic hair-tie, the price-tag seems a bit high (£4.42 for a pair), but given that it's a perfect fit, and likely to last 5+ years, I'll probably buy again.