This is an internal parts set suitable for 16REVO LTX-BF8, etc. It may also be compatible with other models. The parts on the right are unused, and the parts on the left are used. The used parts can also be used without any problems. There are no issues with use, but please understand this before purchasing. Please adhere to the 3N rule (no returns, no refunds, no exchanges). We cannot provide any guarantee for accidents caused by the shipping company, so please understand. Please complete the purchase process within 24 hours. We do not issue receipts.