Note: To determine the correct size, you need to measure the outer diameter of the leg. You can use our easy measuring guide for this. Product Information The Round Insert Cap with Flat Head from Stoeldopshop.nl is the ideal choice for those looking for durable and wear-resistant chair caps. These caps are specially designed to fit tubes with a diameter from Ø10mm to Ø35mm, and are made of extra strong Polyethylene for optimal lifespan. PE is not only very wear-resistant, but also recyclable and therefore a sustainable choice for the environmentally conscious consumer. The round shape of these caps ensures a beautiful and seamless finish for your furniture, while the flat head prevents your metal chair legs from scratching floors. Size Chart Round Insert Cap with Flat Head Outer Diameter (mm) Inner Diameter (mm) 10 6 - 8,5 12 8 - 11,5 13 8 - 11,5 14 7,7 - 13 15 8 - 13,2 16 10 - 14,1 18 13,3 - 16,8 19 14,2 - 17,8 20 15,8 - 19 21 15,5 - 20 22 15,8 - 20,6 24 18-23 25 18,8 - 24 26 20 - 25 28 21,5 - 27 30 23,4 - 29 32 26,3 - 30,5 34 27 - 31,3 35 29 - 34,4 38 32 - 36 40 34 - 38 Material: PE (Polyethylene)Color: black, white