material:NR,neoprene Drive ability, long service life 1,PRODUCT FEATURE:Lateral stiffness and stability,It ... coefficient is low, load capacity is strong, transfer high efficiency, long life. 2,Production length :RA (1800-5000) RB (1800-8000 ... -10000LaSPC22/2140°La=Li+132118"-492"3000-12500La rubber belts manufacturers