Machined aluminum chain keeper makes sure your chain stays where its supposed to be Mounted in place of the front derailler the Chain Keeper works both as a single speed guide or with a 1X multi speed set up Clamps around the seat tube and comes in 3 sizes Wide mouthed chain block, and adjustable rod allow for precise alignment Not intended for DH, FR, or big hit use

Chain Guide Color: BlueMax Tooth Size: N/AMount Type: n/aPackage: pair.

Date First Available: August 6, 2009. Best Sellers Rank: #1,696,820 in Sports & Outdoors. Customer Reviews: 4.6 out of 5 stars 7 ratings 4.6 out of 5 stars. : B002SR3IMU. Size: ?35.0. Part Number: ?620-A. Manufacturer: ?Paul Components. Number of Items: ?1. Color: ?Blue. Brand Name: ?Paul. Item Weight: ?1 Pounds. Item Dimensions LxWxH: ?8 x 5 x 1 inches. Package Weight: ?0.55 Pounds. Item Package Dimensions L x W x H: ?12 x 8 x 2 inches.