Uberkinky Pratt 11 Inch Urethral Sounding Kit

These Pratt sounds are ideal for beginners and experienced urethal play enthusiasts

The stainless steel Pratt set is made up of 29cm (11.5 inch) long sounds which are similar in shape to our Hegar sound set. Each sound gradually increases in width, which allows you to find a perfect fit and experiment with larger sizes. they graduate two french on each sound.

French Gauge	Diameter (mm)	Diameter (inches)		French Gauge	Diameter (mm)	Diameter (inches)
3	1	0.039		16	5.3	0.210
4	1.35	0.053		17	5.7	0.223
5	1.67	0.066		18	6	0.236
6	2	0.079		19	6.3	0.249
7	2.3	0.092		20	6.7	0.263
8	2.7	0.105		22	7.3	0.288
9	3	0.118		24	8	0.315
10	3.3	0.131		26	8.7	0.341
11	3.7	0.144		28	9.3	0.367
12	4	0.158		30	10	0.393
13	4.3	0.170		32	10.7	0.419
14	4.7	0.184		34	11.3	0.445
15	5	0.197