---
title: "init(kernelSizes:paddingStyle:)"
framework: metalperformanceshadersgraph
role: symbol
role_heading: Initializer
path: "metalperformanceshadersgraph/mpsgraphpooling4dopdescriptor/init(kernelsizes:paddingstyle:)"
---

# init(kernelSizes:paddingStyle:)

Creates a 4D pooling descriptor with default values.

## Declaration

```swift
convenience init?(kernelSizes: [NSNumber], paddingStyle: MPSGraphPaddingStyle)
```

## Parameters

- `kernelSizes`: See kernelSizes property.
- `paddingStyle`: See paddingStyle property.

## Return Value

Return Value The descriptor on autoreleasepool.