# FastLaunchLaunchTemplateSpecification
<a name="API_FastLaunchLaunchTemplateSpecification"></a>

Identifies the launch template that the associated Windows AMI uses for launching an instance when faster launching is enabled.

**Note**  
You can specify either the `launchTemplateName` or the `launchTemplateId`, but not both.

## Contents
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 ** launchTemplateId **   <a name="imagebuilder-Type-FastLaunchLaunchTemplateSpecification-launchTemplateId"></a>
The ID of the launch template to use for faster launching for a Windows AMI.  
Type: String  
Pattern: `^lt-[a-z0-9-_]{17}$`   
Required: No

 ** launchTemplateName **   <a name="imagebuilder-Type-FastLaunchLaunchTemplateSpecification-launchTemplateName"></a>
The name of the launch template to use for faster launching for a Windows AMI.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 1024.  
Required: No

 ** launchTemplateVersion **   <a name="imagebuilder-Type-FastLaunchLaunchTemplateSpecification-launchTemplateVersion"></a>
The version of the launch template to use for faster launching for a Windows AMI.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 1024.  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/imagebuilder-2019-12-02/FastLaunchLaunchTemplateSpecification) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/imagebuilder-2019-12-02/FastLaunchLaunchTemplateSpecification) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/imagebuilder-2019-12-02/FastLaunchLaunchTemplateSpecification)