Description
Key Selling Points
- 1.2 Inch (30mm) Compact Diameter — Smallest flask in the Tooltos range; minimizes investment powder and metal waste for single-piece and small-batch casting
- 304 Stainless Steel Construction — High-temperature resistant, corrosion-proof and built for repeated kiln burnout and casting cycles
- Perforated Wall Design — Strategically placed perforations allow vacuum to draw air pockets out of the investment for bubble-free casts
- Flanged Top Design — Creates an airtight seal with the vacuum casting machine plate for maximum vacuum efficiency
- Rubber Base Included — Seals the bottom of the flask during investment pouring; no separate purchase needed
- Three Height Options — 2 inch, 3 inch and 4 inch heights available to match your wax piece size and sprue length
About This Casting Flask
The Tooltos 1.2 Inch Perforated Stainless Steel Casting Flask is the most compact option in the Tooltos casting flask range, designed for single rings, delicate earrings, tiny pendants and student practice casting. The small 30mm diameter significantly reduces the amount of investment powder and metal required per casting, making it cost-effective for precious metal work and ideal for learning. Available in 2, 3 and 4 inch heights to match different wax piece sizes and sprue configurations.
Size Selection Guide
| Size | Diameter | Height | Best For |
|---|---|---|---|
| 1.2 x 2 inch | 30 mm (1.2 in) | 51 mm (2 in) | Tiny rings, small earrings, minimal sprue pieces |
| 1.2 x 3 inch | 30 mm (1.2 in) | 76 mm (3 in) | Standard rings, earring pairs, most common small jewelry |
| 1.2 x 4 inch | 30 mm (1.2 in) | 102 mm (4 in) | Small pendants, intricate designs with longer sprues |
Best For / Not For
| Best For | Not Ideal For |
|---|---|
| Single ring and small earring casting Tiny pendant and charm production Precious metal casting (gold, platinum) to minimize waste Student practice and prototype testing Custom one-of-a-kind piece casting Standard vacuum casting machines with 1.2 in port |
Multi-piece batch production (use 1.5 or larger flask) Pieces wider than 25mm Centrifugal casting (designed for vacuum casting) Gravity casting without vacuum equipment |
Technical Specifications
| Flask material | 304 stainless steel |
| Base material | Rubber (included) |
| Flask diameter | 30 mm (1.2 in) |
| Available heights | 2 in (51mm), 3 in (76mm), 4 in (102mm) |
| Flask weight (empty) | Approx. 85 g (3.0 oz) |
| Wall design | Perforated for vacuum flow |
| Top design | Flanged for airtight vacuum seal |
| Compatible metals | Gold, silver, platinum, brass, bronze and standard jewelry alloys |
| Compatible machines | Standard vacuum casting machines with 1.2 in port (2L-6L capacity) |
Pro Tips
- Use the 2 inch height for very small pieces to minimize sprue length and reduce metal waste per casting
- For precious metal casting (gold, platinum), the 1.2 inch diameter significantly reduces the button and sprue metal that needs to be recycled
- Clean perforations with a small brush or compressed air after each use to maintain optimal vacuum flow
- Check the flange surface for investment residue before each use — a clean flange ensures a proper airtight seal with the vacuum plate
- Store with the rubber base attached to prevent dust from accumulating in the perforations between sessions
Frequently Asked Questions
Q: What size projects is the 1.2 inch flask best for?
A: Ideal for small rings, delicate earrings and tiny pendants up to approximately 25mm in width. For larger pieces or multi-piece batches, the 1.5 inch or larger flask is recommended.
Q: How much investment powder does this flask use compared to larger sizes?
A: The 1.2 inch diameter uses significantly less investment than 1.5 inch or larger flasks, making it cost-effective for single-piece casting and precious metal work.
Q: Can I use this for gold and platinum casting?
A: Yes. The 304 stainless steel construction handles the temperatures required for gold, silver, platinum and other jewelry metals.
Q: How do I choose the right height?
A: Choose 2 inch for very small pieces with short sprues, 3 inch for standard rings and earrings, and 4 inch for small pendants or pieces with longer sprue configurations.
Q: Is this compatible with my vacuum casting machine?
A: This flask is designed for standard vacuum casting machines with a 1.2 inch port. Confirm your machine's flask port diameter before ordering.
Q: Is the rubber base reusable?
A: Yes. The rubber base is reusable across multiple casting sessions. Inspect it before each use for cracks or deformation that could affect the seal.
What's Included
- 1x Perforated stainless steel casting flask (1.2 in diameter, selected height)
- 1x Rubber base
Support
Questions about flask sizing, machine compatibility or order status? Contact the Tooltos team at sales@tooltos.com. We respond within 24 hours on business days.


