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Urban Islands 5-BURNER 304 STAINLESS STEEL, ROTISSERIE, BUILT-IN, L.P. (PROPANE)
We recommend you measure your old parts and compare them to what we show below. This will help insure that you get the correct replacement parts for your Costco grill. This is best done with the old parts out of the grill. Verify your Costco grill model number.
Replacement grill parts for Costco model: 21128
21128 Burners
44305-R 5-Pack Cast stainless steel burners.
- Replaces original Bull part# 44305
- Includes adjustable air shutter and screw in the venturi for adjusting air flow.
- Sold as a set of five (5) burners
Note: The original 44305 burner was a welded stainless steel burner. This replacement burner is a solid cast stainless burner, equivelant to OEM# 16516.
Part Number: BULL-44305-R-X5
Material: stainless steel
Weight: 16.25
Dimensions: 16 1/4” x 2 7/8”
44305-R Cast stainless steel heavy-duty burner.
- Replaces original Bull part# 44305
- Includes adjustable air shutter and a screw in the venturi for adjusting air flow.
- Sold individually
Note: The original 44305 burner was a welded stainless steel burner. This replacement burner is a solid cast stainless burner, equivelant to OEM# 16516.
Part Number: BULL-44305-R
Material: cast stainless steel
Weight: 4.0
Dimensions: 16 1/4” x 2 7/8”
21128 Cooking Grates
16517-R 5-Pack Stainless steel cooking grates.
- SET OF FIVE (5)
- Premium grade 304 stainless steel
- Solid stainless rods
NOTE: Some models refer to this part as a
Cooking Grid.
This part replaces original BULL part# 16517.
Made in USA 
Part Number: BULL-16517-R-X5
Material: stainless steel
Weight: 25.00
Dimensions:
- Front-To-Back: 19 1/2″
- Side-To_Side: 7 1/2″
16517-R Stainless steel cooking grate.
- Premium grade 304 stainless steel
- Solid stainless rods
- Sold individually
NOTE: Some models refer to this part as a
Cooking Grid.
This part replaces original BULL part# 16517.
Made in USA
Part Number: BULL-16517-R
Material: stainless steel
Weight: 5.00
Dimensions:
- Front-To-Back: 19 1/2″
- Side-To_Side: 7 1/2″
21128 Flame Tamers
16521-R 5-PACK Premium grade stainless steel flame tamers.
- Replacement for original Bull part# 16521.
- Fits Bull-made 4 and 5-Burner grills.
- One required for each burner.
- Sold as a set of five (5).
Made in USA
Replaces Costco factory part# BULL-16521-X5
Part Number: BULL-16521-R-X5
Material: stainless steel
Weight: 4.5
Dimensions:
- Front-To-Back: 17 5/8″
- Side-To_Side: 4 5/8″
16521-R Premium grade stainless steel flame tamer.
- Replacement for original Bull part# 16521.
- Fits Bull-made 4 and 5-Burner grills.
- SOLD INDIVIDUALLY.
Made in USA
Replaces Costco factory part# BULL-16521
Part Number: BULL-16521-R
Material: stainless steel
Weight: .90
Dimensions:
- Front-To-Back: 17 5/8″
- Side-To_Side: 4 5/8″
21128 Accessories
Maple wood chips.
- All natural wood smoke flavor
- Great for use in BBQ's or smokers.
- 170 cubic inches (2 lbs. approx) in resealable bag
Try with portk, lamb, poultry, and fish.
Part Number: 00270
Weight: 1.3
20” Professional Extra Long Tong.
20” Stainless steel tong with red soft grip rubber inserts. Grip your food on the grill with ease. Manual lock saves on storage space.
Part Number: 40269
Material: stainless steel
Weight: 0.14
$14.99
Deluxe 13” basting mop with hardwood handle and cotton mop head.
Part Number: 42055
Weight: 0.2
Dimensions: 13
Porcelain Coated Round Topper.
11” diameter x 2.5” deep porcelain coated wok with stainless steel handles and perforations. Rolled edge for rigidity and safety.
Part Number: 98130
Material: porcelain steel
Weight: 1.0
GrillPro EZ Check Gas level indicator. Accurate from -22° to 104°F. Magnetic back. Works on all sizes of tanks.
This tank gauge will monitor your propane level, while you grill, and let's you know when you're running low on gas.
The magnetic tank gauge offers fast, accurate propane level monitoring for any size LP tank. The magnetic backing makes it easy to attach, remove, and reuse across multiple tanks—perfect for grilling, camping, patio heaters, and more
Made in USA
Part Number: 00030
Weight: 0.1
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Costco 21128 - Oct 15 2025
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