Φ50F75: Dia.50mm, F=75mm;
Φ50F100: Dia.50mm, F=100mm;
Φ50F150:Dia.50mm, F=150mm;
Φ50F200:Dia.50mm, F=200mm;
Φ75F75:Dia.75mm, F=75mm;
Φ75F100:Dia.75mm, F=100mm;
Φ75F150:Dia.75mm, F=150mm;
Φ75F200:Dia.75mm, F=200mm;
Φ75F300:Dia.75mm, F=300mm;