Luxite Single Point Knitting Needles. Susan Bates Luxite needles offer a warm, lightweight and inexpensive alternative to aluminum. Luxite is a specially formulated plastic material that is very durable. Each size is color coded so you can find the size you need at a glance. Great when you want to double or triple strand your favorite yarn to create afghans, bulky sweaters and scarves that are finished in a snap. These 14in knitting needles pairs are available in US sizes 17 (12.5mm), 19 (15mm), 35 (19mm) and 50 (25mm): each sold separately.