SP10 SP20 SP30 SP40 SP60 SP10 FOAM - DENSITY 11 Light foam recommended for SP20 FOAM - DENSITY 15 Medium light foam recommended for SP30 FOAM - DENSITY 17.5 Medium quality medicinal foam recommended for SP40 FOAM - DENSITY 22 High-quality medicinal foam recommended for SP60 FOAM - DENSITY 30 High-density orthopedic foam recommended for