Bike Chain Guide MTB Bicycle Chain Guide 1X System ISCG 03 ISCG 05 BB Mount CNC Single Speed Wide Narrow Gear Chain Guide Description: Material: 7075 aluminum alloy CNC & Nylon Spec: BB mount / ISCG03 / ISCG05 (optional) Color: Black / Red (optional) Range: 32-40T round chainring, 32T-38T oval chainring Weight: BB mount about 30g, ISCG03/ISCG05 about 26g his chain guide is a great accessory that ensures the chain will never drop and prolong the life of chainring. Specifications: Features: Suit for 32-40T round chainring, 32T-38T oval chainring. Never drop a chain again and double your chain ring life. CNC 7075 aluminum alloy, super light and strong. Extremely easy to install. Package Included: 1 * Chain Guide