Product Description Guidelines for Replacing E-bike Components:Before you replace components on your e-bike, please read through the guidelines for component replacement for CE-marked e-bikes/pedelecs with pedal assistance. Specifications:Application:All Mountain, Road, GravelDimensions:47 x 47 x 6.95 mmTechnical Information:Material:aluminium (7075-T6)Bolt Material:stainless steelCompatibility:SRAM 30 mm cranksRace Face 30 mm cranksEaston 30 mm cranksSRAM DUB 28.99 mm cranksFeatures:stable bearing preload unit to prevent bearing play at the bottom bracket bearingmade of anodised, CNC-milled aluminiumalso suitable for e-bikesManufacturer Numbers:black:20789blue:20791gold:20797green:20795grey:20799iridescent:20792orange:20794pink:20793purple:20796red:20790silver:20798turquoise:20800Contents:1 x Muc-Off preload ring1 x Muc-Off 30 mm threaded ring1 x Muc-Off 28.99 mm threaded ring1 x Muc-Off stainless steel bolt Manufacturer: Muc-Off Ltd Unit 1 Concept Office Park Innovation Close Poole Dorset BH12 4QT United Kingdom info@muc-off.com Distributor: Sports Nut GmbH Au-Ost 3/1 72072 Tübingen Germany contact@sports-nut.de