Specification product name swing arm sliderMaterial Aluminum alloyColor blackchromeThread size M6x1 25mmFitment Fits bikes with 6mm thread such as most yamaha including R1 1998 2011 R6 1999 2009 Features 1 Swing arm bobbins are for use on bikes with under slung brake arms and uneven swing arms where using a universal stand is impossible 2 Bolt onto motorbike swing arms enabling bike to be lifted by a paddock stand with hook or fork adaptors 3 They allow for easier lifting of the rear of the bike increase stability and most importantly prevent marking scratching the swing arm 4 Ideal for easy fitting to paddock stands Note 1 We provide clear pictures measurements where possible Please check as much as possible to make sure the item is the one that you need 2 Please allow 0 5 1 inch difference due to manual measurement 1inch 2 54cm 3 There Are No Instructions Included In This Kit Professional Installation Is Highly Recommended 4 The color of the actual items may slightly different from the listing images due to different computer screen thanks for your understanding Package Included 2 x swing arm slider