Cascade Baby Alpaca Chunky Yarn - Summer Sky Heather (# 586) Composition: 100% Baby Alpaca Yardage: 108 yards (100g) Weight: Bulky STS: 3.5 per inch Recommended Needle: US#10 (6.5mm) Crochet Hook 7-8mm Perfect for 9mm knitting machine such as Silver Reed SK155