Nominal dia.
TOYOCONNECTOR Leading barb fitting products Surface area ratio
(to leading barb fitting)
Product no. Inner dia. Effective surface area Inner dia. Effective surface area
mm mm2 mm mm2
9 TC3-S-9-R3/8 7.0 38 6.0 28 40% more
12 TC3-S-12-R1/2 10.0 79 8.0 50 60% more
15 TC3-S-15-R1/2 13.0 133 11.0 95 40% more
19 TC3-S-19-R3/4 16.5 214 15.0 177 20% more
25 TC3-S-25-R1 22.5 397 20.0 314 30% more
Surface area ratio