Lykke Flight 5" Interchangeable Circular Needle Set is made of 316 grade stainless steel for a smooth knitting experience. This is the ultimate metal needle set. Included in the MINI 5” sets are: 5 pairs of 5" needle tips in sizes US 0, 1, 1.5, 2, 2.5 (1.5-3mm) 3 clear mini size steel cords— one 24", one 32", and one 40" 2 connectors 2 keys 4 stoppers Blue Denim case with flip up stand and storage pocket Included in the 3.5” sets are: 5 pairs of 5" needle tips in sizes US 0, 1, 1.5, 2, 2.5 (1.5-3mm) 3 clear mini size steel cords—one 16", one 20", and one 24" 2 connectors 2 keys 4 stoppers Blue Denim case with flip up stand and storage pocket Named after the Norwegian word for happiness, Lykke combines high quality materials and thoughtful design to produce beautiful, durable, happy-making knitting needles. All Lykke products come with a lifetime guarantee against manufacturing defects.