This is the T5 text encoder that is directly uploaded from HuggingFace here.

https://huggingface.co/comfyanonymous/flux_text_encoders/tree/main

These have been uploaded previously but they used a NSFW flagged image for the thumbnail making it inaccessible for users on CivitAI Green.

This was uploaded for the purpose of Chromafur but you can use it with any FLUX.1 model.

fp16: t5xxl_fp16.safetensors

fp8 t5xxl_fp8_e4m3fn.safetensors