Made from high performance polyurethane elastomers reinforced with multiple plies of polyester fabric fenner drives composite v-belts offer problem solving alternatives to conventional endless rubber v-belts of classical and metric sp wedge cross sections. Belts are of unique designs & incorporate custom composite materials which provide a number of time & cost saving benefits to maintenance engineers & equipment designers: longer belt life easier & faster installation reduced v-belt inventory -inches downtime-inch maintenance simplified drive design reduced drive vibration. Type a. Size: 1/2 inch by 4 feet.