Sport STP - 4"

by Number One Laboratories


The SPORT is Number One Laboratory's compact version of the Model D with the same shaft and head. 

The small balls on the SPORT eliminate much of the bulk of a standard STP. The SPORT also has a shorter and less bulky receptacle cup which may take a little more practice for some.

The SPORT has a powder soft finish. The outer silicone 'skin' has a clean, soft matte texture. Designed to help reduce chafing and remove tacky silicone feel. 

- Shaft Length: 4" - 10.1 cm.
- Width: 1.25" - 3.2 cm.
- Height (from below balls to top of shaft): 3.5" - 8.9 cm

Customer Reviews

Based on 5 reviews
Dahlia Winders

Great product!e

Dez Earnest

It worked amazing

Chesa Garlough

The product works well and is made well only issue is it’s smaller than I expected the cup to be and the shaft could be a little longer to make it easier to aim and also pull out of pants ect. Overall good product.

Chafing and rash

The overall STP is amazing but there is some cons to it. I was wearing the slingshot harness and the harness gave me a horrible rash on my hip. When I peed I would have to pee very slow. I also felt like I couldn’t really run or do physical activity because it felt like it would fall. This is a okay first STP. Also this gave me really bad chafing around where the cup is. I used corn starch and it still felt really red and rashed. I would not recommend this and going for the more expensive ones.

Brayden Johnson
Sport STP 4”

Harnesses don’t hold the STP in place. The STP leaks way too much through the back. Have been trying for a little over a month now and it’s still not satisfying to me. Unhappy with the product myself, but someone else might be fine with it.


Transguy Supply is a small 2 person team. You can generally expect your order to ship within 7-10 days of purchase.

Final Sales

Please note that due to the sensitive nature of the items in question, all STP, Packer, Harness, and Underwear sales are final. Please make sure you have double-checked product size guides and have selected the correct item.

International Orders

Please note that for all non-US orders, you may be charged local taxes in order to retrieve your order. See our Shipping Policies for more details.