Please note: For the correct size you need to measure the outer diameter of the leg. You can use our easy measuring guide for this. Product information Our new Insert Cap Round with Thread - M8 is a versatile and essential component for anyone looking for a reliable and durable solution for attaching various feet to furniture. This insert cap is extremely suitable for attaching different types of leveling feet. This insert cap can be used with floor glides such as: Adjustable Leveling Foot, Adjustable Leveling Foot with Felt and Scratchnomore Footfixx Threaded. This makes it an ideal choice for those looking for a multifunctional solution. Thanks to the thread, these products can be easily and securely attached to the insert cap. Outer Diameter (mm) Inner Diameter (mm) 18 15 – 16 20 17 – 18 22 19 – 20 25 21 – 22 28 24 – 25 30 26 – 27 32 28 – 29 35 31 – 32 38 34 – 35 40 36 – 37