Large-format RTDL silicone rectal training dilators ranging from 2.25-inch to 3.0-inch head diameters, featuring a symmetrically scaled bulb-tipped expansion head, continuous straight shaft body, and a wide safety base flange.
Dimension specifications matrix table for the large-format RTDL silicone rectal training dilators ranging from 2.25-inch to 3.0-inch nominal sizes, displaying shaft diameter, head dimensions, insertable length, total length, and flange diameter.

RTDL 2.25" - 3.0"

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The RTDL 2.25"–3.0" are the largest versions of the RTDL series. They use the same basic design as the smaller models: a rounded expansion head, a smaller straight shaft, and a wide external flange.

Model Nominal Size (in / mm) Shaft/Body Dia. (in / mm) Head Dimension (in / mm) Insertable Length (in / mm) Total Length (in / mm) Flange Diameter (in / mm)
RTDL 2.25" Size 2.25" / 57mm 1.9" / 48mm 2.6" / 66mm 4.8" / 124mm 5.3" / 135mm 2.7" / 69mm
RTDL 2.5" Size 2.5" / 63.5mm 2.0" / 51mm 2.9" / 74mm 5.4" / 138mm 6.0" / 152mm 3.0" / 76mm
RTDL 2.75" Size 2.75" / 70mm 2.25" / 57mm 3.1" / 79mm 6.0" / 153mm 6.6" / 168mm 3.3" / 84mm
RTDL 3.0" Size 3.0" / 76mm 2.5" / 64.3mm 3.6" / 92mm 6.6" / 168mm 7.4" / 188mm 3.7" / 94mm

 

Choosing your silicone firmness

For the 2.25" (5.72 cm) and 2.5" (6.35 cm) sizes, Bob recommends #00-50 Soft.

For the 2.75" (6.99 cm) and 3.0" (7.62 cm) sizes, Bob recommends #00-20 Very Soft.

The softer materials allow the larger expansion heads to flex more easily. Firmer silicone is available if you prefer more structure.

If you're unsure which firmness to choose, we can make firmness samples.

Color options

#18 and #30 are available in pure translucent silicone.

#00-20, #00-50, and #10 use a translucent white base and can be mixed with standard colors.

Please note

These are large-diameter designs intended for experienced users. Size and silicone firmness both affect how the piece behaves.

Anatomy varies, and no single size or shape will work for everyone. Use appropriate lubrication, never force the product, and stop if you experience pain or significant discomfort.

Inspect the silicone before each use. Do not use the product if it is damaged.

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