Classis flexoris tubicularis productorum usus gas, liquidum, slurriam vel granulosam materias transportabat. Componitur ex interiore et exteriore globulus iacuit et osseus iacuit, et materia sceleti iacuit potest esse fibra bombica, varia synthetica fibra, fibra carbonis vel asbesto, filum chalybeum, etc. Fere, instratum et externum Flexilis caligarum fit e Flexilis naturali, styrene-butadiene rubber aut butadiene rubber; fit ex neoprene et nitrile Flexilis caligarum olei repugnans; acid- et alcali repugnans, caliga-repugnans-repugnans fit ex ethylene propylene globulus, globulus fluorinus vel siliconius globulus, etc.

Suadeo: EPDM:S512F; S5890F; S552; S552-1; S6090WF;J-3060P;J-3080;J-3080P;JEP-3092; TER 4039; TER 4047; TER 4049;
CR: SN121;SN122;SN123;CR111;CR112;SN231;SN232;SN233;SN238;SN239;CR211;CR212;CR213;SN321;SN322;