---
description: Explore Ultralytics YOLO neural network modules, Proto to BottleneckCSP. Detailed explanation of each module with easy-to-follow code examples.
keywords: YOLO, Ultralytics, neural network, nn.modules.block, Proto, HGBlock, SPPF, C2, C3, RepC3, C3Ghost, Bottleneck, BottleneckCSP
---

## DFL
---
### ::: ultralytics.nn.modules.block.DFL
<br><br>

## Proto
---
### ::: ultralytics.nn.modules.block.Proto
<br><br>

## HGStem
---
### ::: ultralytics.nn.modules.block.HGStem
<br><br>

## HGBlock
---
### ::: ultralytics.nn.modules.block.HGBlock
<br><br>

## SPP
---
### ::: ultralytics.nn.modules.block.SPP
<br><br>

## SPPF
---
### ::: ultralytics.nn.modules.block.SPPF
<br><br>

## C1
---
### ::: ultralytics.nn.modules.block.C1
<br><br>

## C2
---
### ::: ultralytics.nn.modules.block.C2
<br><br>

## C2f
---
### ::: ultralytics.nn.modules.block.C2f
<br><br>

## C3
---
### ::: ultralytics.nn.modules.block.C3
<br><br>

## C3x
---
### ::: ultralytics.nn.modules.block.C3x
<br><br>

## RepC3
---
### ::: ultralytics.nn.modules.block.RepC3
<br><br>

## C3TR
---
### ::: ultralytics.nn.modules.block.C3TR
<br><br>

## C3Ghost
---
### ::: ultralytics.nn.modules.block.C3Ghost
<br><br>

## GhostBottleneck
---
### ::: ultralytics.nn.modules.block.GhostBottleneck
<br><br>

## Bottleneck
---
### ::: ultralytics.nn.modules.block.Bottleneck
<br><br>

## BottleneckCSP
---
### ::: ultralytics.nn.modules.block.BottleneckCSP
<br><br>