# Master Flow Dia. Starting Collar

**Brand:** [Master Flow](https://shop.coreranger.com/brands/Master%20Flow)
**Price:** $5.98–$7.98 · in stock
**URL:** https://shop.coreranger.com/product/master-flow-dia-starting-collar-330629766

## Options

- **Duct Size (in.):** 4, 6

## Variants

| Variant | SKU | Price | Stock |
|---|---|---|---|
| 4 | SC4 | $5.98 | in stock |
| 6 | SC6 | $7.98 | in stock |

## Specifications

| Spec | Value |
|---|---|
| Gauge | 30 |
| Material | Galvanized Steel |
| Pack Size | 6 |
| Returnable | 90-Day |
| Product Depth (in.) | 4 in |
| Product Width (in.) | 4 in |
| Product Height (in.) | 3 in |
| Product Weight (lb.) | 0.15 lb |
| Manufacturer Warranty | Free from Manufacturer Defect at Time of Delivery. |
| Brand/Model Compatibility | Universal |

## Description

The Master Flow 4 in. Diameter Starting Collar is crimped for easy installation. This starting collar can be used to transition from a flat surface such as an unlined metal plenum to round metal pipe. Can also be attached to most unlined metal ductwork, such as rectangular duct. Constructed of galvanized steel, this starting collar is made for durability.

• Used to transition from a flat surface to round pipe
• Durable galvanized steel construction
• Commonly called an A-collar