This is an HPI Air Cleaner Set for .21 to .28 size car engines. FEATURES: Two filter design for extra engine protection Inner filter is pre-oiled YOU WILL RECEIVE: One assembled air filter One rubber mounting elbow Four 6" long zip ties (for mounting filter to elbow and elbow to carb REQUIREMENTS: Installing onto the carb SPECIFICATIONS: Length: 4" (total including elbow) Diameter of elbow: .57" (15mm) Diameter of filter: 1.85" (47mm) COMMENTS: For Air Cleaner Sleeve Set, use HPIG7199. For Air Cleaner Foam Element Set, use HPIG7204. kpm01/06/2005 ir/jxs