Brand: Friendship 729 Model A: Blue ALC ADVANCE Structure: 5 plywood+2 blue aryl carbon koto+blue aryl carbon+ayous+candlenut core+ayous+blue aryl carbon+koto Playing Style: OFF+ Play Style: Fast Attack&Arc Weight: FL 88g±5, CS 85 ±3g Thickness: 5.8±0.1MM Handle Type: CS/FL Feature: Same structure with VIS, external carbon, fast speed, powerful strength, long arc, easy to play for new players. Model B: Yellow KLC ADVANCE Structure: 5 plywood+2 Yellow aryl carbon Limba+ayous+yellow aryl carbon+candlenut core+yellow aryl carbon+ayous+limba Playing Style: OFF+ Play Style: Arc&Fast Attack Weight: FL 88g±5, CS 85 ±3g Thickness: 5.8±0.1MM Handle Type: CS/FL Feature: Same structure with long 5, inner carbon, powerful bottom strength, superior control, more suitable for advanced players. 729 aromatic carbon series base plate upgrade products, AD series blue aromatic carbon & yellow aromatic carbon, new fiber prepreg and wood lamination technology