Support specification: ISCG 05,Packag Include: 2 pcs Screws, 5 pcs Spacers. Never drop a chain ever again and double your narrow wide chain ring life. High-strength material, wear and resistance to deformation, high molecular nylon parts increase shock absorb, wear life, and reduce friction and noise. Extremely easy to install and adjust using a single 4mm Hex tool, without removing your cranks. Suit for narrow-wide 30~40T chainring(round chainring), 30~38T chainring(oval chainring), Adjustable design.

Are Batteries Included: No. Size: ISCG05. Number of Pieces: 5. Color: Black. Brand: CYSKY. Date First Available: April 14, 2017. Best Sellers Rank: #696,717 in Sports & Outdoors. Customer Reviews: 3.7 out of 5 stars 55 ratings 3.7 out of 5 stars. : B06ZYYBNGS. Size: ?ISCG05. Part Number: ?CYSKY. Manufacturer: ?CYSKY. Color: ?Black. Brand Name: ?CYSKY. Package Weight: ?0.03 Kilograms. Item Package Dimensions L x W x H: ?4.96 x 2.32 x 1.06 inches.