These 3Doodler Start+ Eco plastic refills for the 3Doodler 3D Pen are low-heat, non-toxic and completely safe for kids. Plastic refill strands for the 3Doodler Start+ pen, Can be used on almost any material or surface and is not hot to the touch, 3Doodler Start+ plastic extrudes up to six times the original length. One 6-inch strand can produce over 35 inches of Doodles. WHAT'S INCLUDED: 250 Strands of Start Plastic. DETAILS: 8.66" x 5.51" x 0.79", Weight: 0.49 lbs., Compatible with SPLUS 3Doodler Start+ Pen, Recommended age: 6+, Manufacturer's 1-year limited warranty. For warranty information please click here - https://cs.kohls.com/app/answers/detail/a_id/140. Size: One Size. Color: Primary Pow. Gender: unisex. Material: NONE.