Number One LaboratoryNumber One Laboratory

-Always practice in the shower first. It's easier to use an STP without pants on and easy to clean up.

-Do not push up from the bottom of the STP Cup- this can warp the cup while in use and cause leakage. Instead, use your legs to squeeze the sides of the cup inwards a little. This will deepen the cup and prevent spillage.

Our STP Skins are lightweight and compressable, STP cup and tube will add bulk and siffness.

-Removing the STP when not in use allows for more comfortable packing.

-Turn the STP cup sideways to compress and reduce profile.

-Choosing pants with a longer inseam/zipper will make packing much easier. Tight jeans with a short zipper are the hardest to pack in.

-The Clip In Waistband Harness allows for the most adjustability.

It isn’t paint at all! Each piece is finished with thin, translucent layers of tinted platinum silicone that cure completely to the surface. The color is part of the silicone itself, it will not fade, flake, or peel.

-The Clip In Waistband Harness offers more flexibility for placement and adjusting. Available in both adjustable and fitted. The adjustable harness is a practical solution allowing for size discrepancies, but it does have one small metal slider. The fitted Clip In Waistband Harness has no metal parts, however, you must ensure that it is measured to fit your waistband including the width of the prosthetic you intend to use.

-The Sling Shot Harness secures snugly around each thigh and holds your STP Skin in place between the legs. The Sling Shot Harness is low profile with no waistband, and is also available in fitted or adjustable sizing. It holds the STP Skin securely in place but offers less movement for adjustment.

Some people mix their own water-based fluid for use with the ejection system. A gentle, skin-safe option is water with a little clear aloe gel and a pinch of cornstarch to add viscosity. Always test small amounts first and clean thoroughly after each use.

The B.J.E.J. features a narrow center channel designed for fluid flow and oral suction. We always recommend using a condom for safety and cleanliness. Use water-based lubricant only, and clean thoroughly before and after each use.

Always use water-based lubricant only. Never use silicone-based lubes or oils with platinum silicone products, they can cause the surface to become sticky, swell or degrade over time.

Our products are made from a strong and flexible platinum silicone that does not tear when using the Clip In Harness. We can not guarantee that made from other materials will not tear when using the Clip In Harness.

We sell our STP Tubes in 2 lengths, 6 inches and 12 inches. Most people will need to cut their tube to fit. If using with an STP Skin, your STP Tube needs to be atleast as long as the shaft. The rest of the Tube length will depend on the distance from the front of your trousers to approximately the placement of your urethra. All bodies are different. If you're not sure we suggest buying the larger tube and trimming it to size once you can experiment in person with it.

In order to make our products customizable to every body, we use a premanufactured silicone tube which can be trimmed to fit by each unique user. The tube is made of a semirigid silicone and may be cut with a regular pair of scissors or a sharp knife.

We recommend using a ruler to get an accurate sense of the measurements listed for our Cup sizes. You may also want to use a ruler to measure from the front of your body to the desired point of comfort.

Our Platinum Silicone products may be washed in warm soapy water. To sterilize they may be boiled for two minutes or washed in a mild bleach solution. To remove odor, try soaking in a denture cleaning solution overnight. Always allow to dry completely before storage. Powder with corn starch to prevent chafing as needed.

Our harnesses may be hand or machine washed. We recommend air drying as machine drying will reduce the life and strength of the elastic.

We use Platinum Silicone in all of our silicone products.

The STP Tube is a premanufactured silicone semirigid tube.

Our harnesses are made from a thick elastic that is plush on the inside.

Our Clips are hard plastic and adjustable sliders are metal with an enamel coating.

Due to the personal and hygienic nature of our products, all sales are final and we do not accept returns or exchanges under standard circumstances. If your item arrives defective, damaged, or incorrect, please see below.

We stand behind our products. If your order arrives defective, damaged, or incorrect, contact us within14 calendar days of deliveryathello@numberonelaboratory.comwith your order number and a description of the issue. We'll evaluate and make it right with a replacement or refund as applicable. If a return is required for a defective or damaged item,we will cover return shipping costs.

Yes. International orders may be subject to customs fees, import duties, or tariffs upon delivery. These charges vary by country, are outside our control, and are the responsibility of the customer. We are not able to predict or cover these costs on your behalf.

EU customers have a 14-day right of withdrawal under EU consumer protection law. However, please note that our products are heat-sealed for hygiene and safety. Once the sealed packaging has been opened, the right of withdrawal no longer applies under the hygiene goods exemption.

If your item's packaging is fully sealed and unopened, you may submit a withdrawal request within 14 days of delivery. Return shipping is the responsibility of the customer, except where the item is defective or damaged, in which case we will cover return shipping.

To submit a withdrawal or return request, use our returns portal: 👉 Request a Return or Cancellation

For full details, see our Refund & Return Policy at the bottom of the page.