RL & IR Head Circumference Classification
RL Series
Head Size | Models |
Large Head | R2, R3, R4, R5 |
Medium Head | R1, R9, R10 |
Small Head | R6, R7, R8 |
IR Series
Head Size | Models |
Large Head | S13, S10, S54, 54P, 30, 27, 27P |
Slightly Large Head | 2, 20, 19 |
Medium Head | 31, 55 |
Small Head | T Series, A Series, S14, B1/2, 53, 33 |