---
product_id: 540767561
title: "J/B PR-308 Flexible Vacuum Pump Coupler Sleeve Only"
brand: "jb industries"
price: "$47.88"
currency: USD
in_stock: true
reviews_count: 5
category: "Jb Industries"
url: https://www.desertcart.us/products/540767561-j-b-pr-308-flexible-vacuum-pump-coupler-sleeve-only
store_origin: US
region: United States of America
---

# 1-1/8" diameter perfect seal 7/8" length precision fit Universal replacement for multiple models J/B PR-308 Flexible Vacuum Pump Coupler Sleeve Only

**Brand:** jb industries
**Price:** $47.88
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your pump game with the ultimate coupler sleeve—fit, function, flawless!

## Quick Answers

- **What is this?** J/B PR-308 Flexible Vacuum Pump Coupler Sleeve Only by jb industries
- **How much does it cost?** $47.88 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/540767561-j-b-pr-308-flexible-vacuum-pump-coupler-sleeve-only)

## Best For

- jb industries enthusiasts

## Why This Product

- Trusted jb industries brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Lightweight & Compact:** Only 18g with sleek dimensions for easy handling and installation
- • **Universal Compatibility:** Replaces PR-308, 231415, Guardian 18, and more—one sleeve to rule them all
- • **Durability You Can Trust:** Built to match OEM longevity, keeping your equipment running longer
- • **Highly Rated Reliability:** 4.8-star average from 165+ professionals who depend on it daily
- • **Precision Engineered Fit:** Exact 7/8" length and 1-1/8" diameter for seamless integration

## Overview

The JB Industries J/B PR-308 Flexible Vacuum Pump Coupler Sleeve is a precision replacement part designed to fit multiple pump models with exact 7/8" length and 1-1/8" diameter. Lightweight at 18 grams, it offers durable performance and seamless compatibility, backed by a 4.8-star rating from over 165 users. Ideal for professionals seeking reliable, ready-to-install pump maintenance solutions.

## Description

Vaccum pump copler sleeve

Review: This part broke and my generator and was more readily available than the Kohler part so I took the gamble and fit perfectly. Considering the application of both pieces I expect it to have the same longevity and will definitely order another for backup.
Review: Fit my DV-142N perfect and got me up and running.

## Features

- J/B Vacuum Pump Coupler Sleeve Only
- Replacement Sleeve Only for the PR-208
- Length: 7/8"
- Diameter: 1-1/8"
- Replaces / Supersedes: PR308 , 231415 , Guardian 18 , 684520331976 and others

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07B8B59QW |
| ASIN  | B07B8B59QW |
| Customer Reviews | 4.8 4.8 out of 5 stars (165) |
| Customer reviews | 4.8 4.8 out of 5 stars (165) |
| Date First Available | 5 March 2018 |
| Date First Available  | 5 March 2018 |
| Item Package Quantity | 1 |
| Item Weight | 18 g |
| Item model number | J/B_PR-308 |
| Item model number  | J/B_PR-308 |
| Manufacturer | J/B Industries |
| Manufacturer  | J/B Industries |
| Package Dimensions | 8.89 x 5.51 x 2.49 cm; 18 g |
| Package Dimensions  | 8.89 x 5.51 x 2.49 cm; 18 g |
| Part number | J/B_PR-308 |

## Images

![J/B PR-308 Flexible Vacuum Pump Coupler Sleeve Only - Image 1](https://m.media-amazon.com/images/I/411pKK2uFjL.jpg)

## Questions & Answers

**Q: will this fit a Bestech BT-5?**
A: I measured the length of mine, they only offered two lengths, a 7/8” long and a1 1/18” long one, mine was 7/8” long

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***R on 13 March 2023*

This part broke and my generator and was more readily available than the Kohler part so I took the gamble and fit perfectly. Considering the application of both pieces I expect it to have the same longevity and will definitely order another for backup.

### ⭐⭐⭐⭐⭐ Review
*by D***. on 23 August 2022*

Fit my DV-142N perfect and got me up and running.

### ⭐⭐⭐⭐⭐ Review
*by U***E on 28 October 2022*

exactly as shown- perfect condition perfect fit

## Frequently Bought Together

- J/B Industries PR-308 Flexible Vacuum Pump Coupler Sleeve Only
- TSI Supercool Vacuum Pump Oil, Synthetic, 32 Oz., Clear (V32)
- XTPTFABS PR308 / PR-308 Vacuum Pump Coupler Sleeve/Pump Sleeve Compatible with PR208 / PR-208 Vacuum Pump Coupler(Replace#PR308, 231415, 684520331976)

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---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-10-21*