INSUM Extra Duty Practice Tennis Balls
- Tennis Ball Duty Rating: Extra Duty
- Material Type: Rubber
- Stitching Type: Stitched
- Item Weight: 1.5 pounds
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A well-rated bulk 12-pack that suits practice sessions and pet fetch, with a listed bounce a touch higher than smaller training-ball sets.
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ASIN: B0D733D582Category: Tennis Balls
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Overview
INSUM's 12-ball set pairs a natural rubber core with a polyester-blend felt cover and a drawstring mesh bag, aimed at practice sessions and pet play rather than certified match use.
Twelve balls per bag is double the SHYUJAJIE set above and gives more runway before a reorder, useful for anyone feeding a ball machine or a dog that goes through balls fast. The seller calls out tight seam bonding for durability, a detail the polyester-blend felt cover backs up.
- 2.5 inch diameter, 145 cm bounce height
- 12 balls plus drawstring mesh bag
- Natural rubber core with polyester-blend felt
- Reinforced seam bonding
Who it's for
Suits players stocking a practice bag or ball machine, and pet owners who want a bigger reserve than a 3- or 6-ball tube. Less suited to anyone who needs balls approved for sanctioned matches.
Pros and cons
- 12 balls per pack for less frequent restocking
- Drawstring mesh bag keeps balls contained
- Reinforced seam bonding for durability
- Not certified for sanctioned match play
- Bounce is higher than standard, which may feel different from a name-brand ball
Performance notes
The rubber core and felt-polyester cover are built for a higher, 145 cm bounce than lighter training balls, and the seller points to tight seam bonding as the reason the cover resists splitting under repeated fetch or drill use. That seam durability is the main functional difference the description calls out versus a standard ball.
Specifications
| Brand | Insum |
|---|---|
| Dimensions & fit | |
| Item Weight | 1.5 pounds |
| Item Diameter | 2.5 inches |
| Size | 12 Count |
| Capacity & performance | |
| Age Range Description | Youth |
| Construction & materials | |
| Material Type | Rubber |
| Color | Yellow |
| Construction Type | Stitched |
| Included components | |
| Unit Count | 12 |
| Other details | |
| Tennis Ball Duty Rating | Extra Duty |
| Stitching Type | Stitched |
| Sport Type | Tennis |
| Number of Items | 12 |
Frequently asked questions
How many balls come in the INSUM bulk pack?
The set includes 12 tennis balls and a reusable mesh bag with a drawstring closure.
What is the bounce height of INSUM tennis balls?
The listing specifies a bounce height of about 145 cm from a 2.5 inch diameter ball.
Are INSUM tennis balls made for dogs?
The seller markets them for both training practice and pet fetch, built from the same rubber core and felt cover.