Check the listing for details. 2 MINT Genuine Bose White UB-20 Swivel Knuckle Part For Cube Speaker Brackets. Color: White, Condition: Used. Listed at 24.99 USD. Hi, I'm Tony, I have a passion for Bose electronics and I have been collecting, repairing, and reconditioning old-school & vintage USA made Bose products for as long as I can remember. I am a mechanical engineer and I do this in my spare time. Please check out my other listings, I only specialize in Bose products with hundreds to choose from. GENUINE BOSE PARTS A MINT PAIR OF UB-20 WHITE SWIVEL KNUCKLES, (BRACKET PARTS) These knuckles are to be used with the UB-20 Bose brackets for use with double cubes, single cubes, Greylines, and mini Jewel cubs. Included: A pair of knuckles, a pair of standard speaker mounting screws, and a pair of centering tabs. The screws that are included are for the standard double cubes, single cubes, and Greylines. (These standard screws will not screw into the back of the Jewel speakers they are too large) WHAT IS PICTURED, IS WHAT YOU WILL RECEIVE, NOTHING MORE & NOTHING LESS. Shipping & handling with care USPS Ground Advantage is FREE