GRB 36

Discover an exceptional blend of progressive depth control and multi-stage fluid containment with the GRB 36. Expertly engineered within our premier Graduated Retaining Ball (GRB) design series, this 9.0-inch medium-length silicone colon nozzle is designed specifically for users seeking a high-retention ball profile without the intense threshold volume of larger traditional plugs. Featuring a unique sequence of three progressively larger, graduated expansion beads, the GRB 36 offers superb functional control: the repeating waves allow you to choose your preferred depth of insertion, while the final smooth oval ball creates an incredibly comfortable natural muscle anchor that blocks fluid backflow, minimizes leakage, and reduces early abdominal cramping.

Three-Stage Graduated Geometry & Sigmoid Fluid Delivery: The architectural layout of the GRB 36 acts as a seamless, built-in size progression system along a single shaft. It guides initial placement with a smooth, 2.25-inch long entry tip measuring a slender 0.75 inches in diameter. Beyond this introductory zone, the profile transitions into the First Expansion Bead at a gentle 1.0-inch diameter, drops into a 0.7-inch relaxation valley, and rises into the Second Expansion Bead at a 1.1-inch diameter. Finally, a Third Expansion caps off the sequence with a smooth, oval-shaped 1.4-inch maximum diameter anchor bulb. At 9.0 inches in overall length, the tip safely delivers solution directly into the lower sigmoid colon to promote a smooth filling experience, finishing with a 1.0-inch long base valley measuring 0.75 inches in diameter that lets your muscles lock the plug hands-free against a wide safety base flange.

Anatomical Design & Dimensions:

• Total Length: A highly stable, medium-profile 9.0” overall length from tip to flange.

• Insertable Depth: Provides up to 7.5” of fully usable insertion length to access deep internal contours.

• Sigmoid Comfort Reach: Positions fluid delivery directly into the lower sigmoid colon, ensuring a deeper fill that minimizes early muscle contraction and cramping.

• Three-Tier Graduated Node Column: Features a progressive staircase staging from a 1.0” initial bead, to a 1.1” secondary bead, up to a 1.4” final oval anchor bulb, split by deep relaxation valleys to form independent fluid dams.

• High-Leverage Retention Valley: Drops back into a 1.0” long by 0.75” diameter base valley neck, letting sphincter muscles rest comfortably without fatigue during hands-free anchoring.

• Secure Safety Base: Anchored by a wide safety base flange to prevent over-insertion and provide absolute hands-free confidence.

👑 Bob's Choice Recommendations

• Experience Level: Advanced Beginner to Intermediate Friendly Sizing. While the 7.5" insertable length offers advanced, deep fluid delivery, the narrow 1.0" to 1.4" graduated ball diameters make this an exceptionally gentle and easy-to-use option for newer users, small-frame individuals, or anyone transitioning to a longer-profile colon tube.

• The Prime Durometer Recommendation: For a multi-beaded, progressive profile like the GRB 36, Bob highly recommends ordering in our #10 (medium) composition. At this length, our medium firmness provides the ideal sweet spot—offering enough flexibility to effortlessly follow your body's natural internal curves while retaining the structural toughness and column strength needed to bypass muscle contractions smoothly.

Color Options: #18 and #30 are available in pure translucent. #00-50 and #10 base colors are translucent white and can be mixed with any standard color.

Important Safety Disclaimer: Because individual anatomy varies, we cannot guarantee a full fit for all larger diameter pieces. Please use all products with care. By purchasing, you accept full responsibility for safe use. If you experience discomfort, discontinue use immediately.